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Gaurav Seth 4 years, 2 months ago

Given : a + b + c = 0

To Find :

From the given equation, we can find out :

a + b + c = 0

b + c = - a
c + a = - b
a + b = - c

Putting these equations in the above equation, we get

→

• {Identity : (a + b + c)³ = a³ + b³ + c³ - 3abc }

→ Given that a + b + c = 0, then

(0)³ = a³ + b³ + c³ - 3abc

a³ + b³ + c³ = 3abc

Putting this in above equation, we get

→

→ 3

Suzanne Smitha 4 years, 2 months ago

a+b+c=0 1. b+c=-a 2. a+b=-c 3. c+a=-b -a^3/bc + -b^3/ca + -c^3/ab =-(a^3+b^3+c^3)/abc =3abc/abc =3

Hanshika (Honey) 4 years, 2 months ago

A+b+c=0 1. b+c=-a 2. a+b=-c 3. c+a=-b = (-a)^3/bc + (-b)^3/ca + (-c)^3/ab =-(a^3+b^3+c^3)/abc =-3abc/abc =-3

ANSWER

Represent 4.323 on the number line

Posted by Jeevitha R 4 years, 2 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Polynomial ch-2 ex-2.4 Q-4 point-2

Posted by Aayushi Punjabi 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Trishla Jain 4 years, 2 months ago

Q. 2x² + 7x +3 Ans.... By splitting the middle term 2x² + (6+1)x +3 2x² + 6x + x + 3 2x(x+3) +1( x+3) (x+3)(2x+1)

ANSWER

X square+5x- 36 . Please factorise this polynomial

Posted by Khushboo Singh 4 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Yogita Ingle 4 years, 2 months ago

X²-5x-36=0

x²-9x+4x-36=0

x(x-9)+4(x-9)=0

(x+4)(x-9)=0

x=-4 x=9

Aishwarya Satish 4 years, 2 months ago

(x+9)(x-4)

ANSWER

What are the first 4 identities

Posted by Agnes Jimmy 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 4 years, 2 months ago

Identity I: (a + b)² = a² + 2ab + b²

Identity II: (a – b)² = a² – 2ab + b²

Identity III: a² – b²= (a + b)(a – b)

Identity IV: (x + a)(x + b) = x² + (a + b) x + ab

3Thank You

ANSWER

A triangular side walls of a flyover have been used for advertisement. The sides of the walls are 12m , 22m and 120 m. The advertisement yield an earning of Rs5000 per m square per year. A company hired one of its walls for 3 months. How much rent did it pay?

Posted by Hakeem Urva Tul Wusqa 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Suzanne Smitha 4 years, 2 months ago

The perimeter of a triangle is equal to the sum of its three sides it is denoted by 2S. 2s=(a+b+c) s=(a+b+c)/2 Here ,s is called semi perimeter of a triangle. The formula given by Heron about the area of a triangle is known as Heron's formula. According to this formula area of a triangle= √s (s-a) (s-b) (s-c) Where a, b and c are three sides of a triangle and s is a semi perimeter. This formula can be used for any triangle to calculate its area and it is very useful when it is not possible to find the height of the triangle easily . Heron's formula is generally used for calculating area ofSolution: Let the sides of the triangle are a=122 m, b=22 m & c= 120 m. Semi Perimeter of the ∆,s = (a+b+c) /2 s=(122 + 22 + 120) / 2 s= 264/2= 132m Using heron’s formula, Area of the wall = √s (s-a) (s-b) (s-c) = √132(132 – 122) (132 – 22) (132 – 120) = √132 × 10 × 110 × 12 =√11×12×10×11×10×12 =√11×11×12×12×10×10 = 11×12×10 = 1320m² Given, earning on 1m² per year= ₹5000 Earning on 1320 m² per year=1320×5000= ₹6600000 Now, earning in 1320 m² in 12 months= ₹6600000 earning in 3 months = ₹ 6600000 ×3/12 = ₹ 1650000 Hence, the rent paid by the company for 3 months is ₹ 1650000.

ANSWER

write 2 rational no between √2 and √3

Posted by Anshul Kumari 4 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Suzanne Smitha 4 years, 2 months ago

We know that, √2 = 1.4142135..... √3 = 1.73205080...... As we know that rational numbers are those decimal numbers which are either terminating or repeating. So, you can given any terminating or repeating decimal number between 1.4142135 ...... and 1.73205080 ....... as your answer. Thus your answer can be any of the following rationals: 1.415, 1.416, 1.417, 1.532, 1.582, 1.60, 1.62, 1.70, 1.72 etc

Yogita Ingle 4 years, 2 months ago

√2 ≈ 1.414 and √3 ≈ 1.732 . Then we have a rational number 1.5 and 1.6 which is in between √2 and √3.

3Thank You

ANSWER

Wht is radius

Posted by Ritika Sin 4 years, 2 months ago

CBSE > Class 09 > Mathematics

5 answers

Suhani Singh 4 years, 2 months ago

*half of dimeter*

Aishwarya Satish 4 years, 2 months ago

Half of the diameter

Kashish Kumari 4 years, 2 months ago

The half of the diameter

Dhawal Khatri 4 years, 2 months ago

Hello Ritika

Yogita Ingle 4 years, 2 months ago

When we connect a point on the circumference of a circle to the exact centre, then the line segment made is called the radius of the ring. The distance between the center of the circle to its circumference is the radius.

ANSWER

What is the number that left on the number line, called

Posted by Yashai Lakshete 4 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Aishwarya Satish 4 years, 2 months ago

Negative integers(-)

Vatsal Paliwal 4 years, 2 months ago

Negative numbers and they have sign of -

ANSWER

X:Y = 7:2 find X and Y

Posted by Daksh Dhote 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Vatsal Paliwal 4 years, 2 months ago

Put x = 7 and y = 2

ANSWER

draw a graph of the equation y=3x

Posted by Akshit Kalyan 4 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Suzanne Smitha 4 years, 2 months ago

Y=3x is a simple linear equation. To graph a linear equation Y=3x means to draw a line in the 2-D plane. Notice that the intercept on y-axis is 0 meaning the line will pass through the origin and slope of line is 3. However, graphing this line is fairly straightforward. For every value of x in real number, Y is 3 times that value of x. So, draw the 2-D plane and make x and y axes. Since, integral values are easy, we start plotting the integral points. So, some starting points can be, x | 0 1 2 -1 -2 Y | 0 3 6 - 3 - 6 So, plot these points on the 2-D plane, join them using a straight line.

Akshit Kalyan 4 years, 2 months ago

aaaaaaaaaacccccccccuuuuuuuuuufffffffsssssssssjjjj

ANSWER

If vertical angle of an isosceles triangle abc is 60° then it is an equilateral angle??

Posted by Kumar Sudhanshu 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Kashish Kumari 4 years, 2 months ago

Your question is wrong because if an isosceles triangle have 60°angle in twwo side then, third side is also 60°+60°=180 - 120 =60° so , this is an equilateral triangle .

ANSWER

Rationalise the denominator of the following:3+√7/3-4√7

Posted by Nishika Thakkar 4 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Devansh Tiwari 4 years, 2 months ago

8+3√7

Dhawal Khatri 4 years, 2 months ago

Hello Nishika

ANSWER

What is the meaning of sigma (symbol)? How can we use this symbol ? Give an example

Posted by Hanshika (Honey) 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Gaurav Seth 4 years, 2 months ago

The symbol Σ (sigma) is generally used to denote a sum of multiple terms. This symbol is generally accompanied by an index that varies to encompass all terms that must be considered in the sum.

ANSWER

7o4s7p5d8

Posted by Rohini Alandkar 4 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Devansh Tiwari 4 years, 2 months ago

What does this question means??? It's really very bad

Garima Garima 4 years, 2 months ago

PLS DON'T POST SUCH QUESTIONS......

ANSWER

If x=1+(5^1/3)+(5^2/3) ,then find the value of: x^3 - 3x^2 - 12x + 6

Posted by Hanshika (Honey) 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Shreya Mittal 4 years, 2 months ago

x=1+(5^1/3)+(5^2/3) x=1+(5/3)+(25/3) (Add by taking lcm) x=(3+5+25)/3 x=33/3 = 11 Finding value of: x^3 - 3x^2 - 12x + 6 Put the value of x i.e. 11: =x^3-3x^2-12x+6 =(11)^3 - 3 (11)^2 - 12X11 + 6 =1331 - 3X121 - 132 + 6 =1331 - 363 - 132 + 6 =842

4Thank You

ANSWER

1+2+3=??

Posted by Dinkar Kendre 4 years, 2 months ago

CBSE > Class 09 > Mathematics

4 answers

Kashish Kumari 4 years, 2 months ago

Obviously 6

Janvi Chauhan 4 years, 2 months ago

Garima Garima 4 years, 2 months ago

Dinkar Kendre 4 years, 2 months ago

ANSWER

a^1/a=b^1/b=c^1/c & a^bc+b^ac+c^ab=729 find a^1/a

Posted by Hanshika (Honey) 4 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Hanshika (Honey) 4 years, 2 months ago

Thanks

Gaurav Seth 4 years, 2 months ago

Let say

Taking power ABC each side then

Hence

ANSWER

(2a-b-c)^3

Posted by Priyanshu Bisht 4 years, 2 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Find the zeroes of polynomial f(x)= x²+5x–14

Posted by Mnp Mnp 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Yogita Ingle 4 years, 2 months ago

ANSWER

How to locate under root 6 on number line

Posted by Jitendra Agrawal Agarwal 4 years, 2 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

Area of square is

Posted by Ishmita Thakur 4 years, 2 months ago

CBSE > Class 09 > Mathematics

3 answers

Hanshika (Honey) 4 years, 2 months ago

Also 1/2 × (diagonal)^2

Sarita Panda 4 years, 2 months ago

(Side)²

Pankaj Gautam 4 years, 2 months ago

Side multiply side

ANSWER

Find volume of cube whose total surface area is 486cm²

Posted by Ru Jain 4 years, 2 months ago

CBSE > Class 09 > Mathematics

4 answers

Suzanne Smitha 4 years, 2 months ago

Surface area of cube = 6 edge^2486 486= 6edge^2 486/6 = edge^2 81 = edge^2 √81 = √edge^2 9 cm = edge Volume = edge^3 = 9^3 = 9 x 9 x 9 = 729 cm cube

Pankaj Gautam 4 years, 2 months ago

Edge =a Surface area =6a square =486cm square 6a square =486cm square a square =81 a= root 81 a=9cm Edge =9cm Volume =a cube =9cube =729cm cube

Gaurav Seth 4 years, 2 months ago

Edge = a
Surface area = 6a² = 486 cm²

6a² = 486 cm²

a² = 486 /6

a² = 81

a = √81

a = 9 cm

Edge = a = 9 cm

Volume = a³ = 9³ = 729 cm³

@Hi®En″™ S~En 4 years, 2 months ago

Is 0 a rational number

3Thank You

ANSWER

a+b+c=9 and ab+bc+ca=23then a3+b3+c3-3abc=

Posted by Thanushree Bhat 4 years, 2 months ago

CBSE > Class 09 > Mathematics

2 answers

Suzanne Smitha 4 years, 2 months ago

It is given that, 1. a+b+c=9 2.ab+bc+ca=23 Do the square of equation( 1) we get. (a+b+c)^2 = 9^2. a^2+b^2+c^2 +2(ab+bc+ca)=81. a^2+b^2+c^2+ 2(23)=81 a^2+b^2+c^2+46 =81 3. a^2+b+c=81_46=35 Now, a^3+b^3+c^3_ 3abc = (a+b+c)[a^2+b^2+c^2_ (ab+bc+ ca)] =9[35_ 23] =9[12] =108 Hope it helps you.

Bangtan Army Forever 4 years, 2 months ago

I think the correct answer is 108.hope it help you

ANSWER

x=-5 can be written as 1.x+0.y+5=0. How ?

Posted by Harsh Snehal Lokhande 4 years, 2 months ago

CBSE > Class 09 > Mathematics

1 answers

Drishti Garg 4 years, 2 months ago

Put the value of x in the equation. Then 1(-5)+0y+5= (-5)+0y+5=0+0y=0. No matter what is value of y because when multiplied by0 answer will be 0

ANSWER

How we visualise the 4.75 on number line by successive magnification

Posted by Himanshu Pandey 4 years, 2 months ago

CBSE > Class 09 > Mathematics

0 answers

ANSWER

To become a engineer which subject we have to take

Posted by Krish Achra? 4 years, 2 months ago

CBSE > Class 09 > Mathematics

4 answers

Sanjay Deshwal 4 years, 2 months ago

Science stream.......... ???

Suzanne Smitha 4 years, 2 months ago

You have to take the science stream of subjects. They are Physics, chemistry and Mathematics. It is called PCM or MPC group in 11 & 12 th classes or intermediate board of the state Government. If you study these subjects securing 60% & above marks, you can become an engineer by writing Competitive Exams like EAMCET etc,. after 12th.

Eshita Nagaria 4 years, 2 months ago

Pcm

Mehbub Tahmim Ahmed 4 years, 2 months ago

After passing class 10 by above 90℅ .you have to take science and math for becoming engineer The main focus should be on physics and chemistry ,and a little bit on biology.