CBSE > Class 09 > Mathematics | CBSE Board | Homework Help

(1) (a + b)² = a² + 2 ab + b² (2) (a + b)² = (a - b)² + 4 ab (3) (a - b)² = a² - 2 ab + b² (4) (a - b)² = (a + b)² - 4 ab (5) a² - b² = (a + b) (a - b) (6) (x+a) (x+b) =x² + (a + b) x+a b (7) (a+b)³=a³+3a²b+3ab²+b³ (8) (a+b)³=a³+b³+3ab(a+b) (9) (a-b)³=a³-3a²b+3ab²-b³ (10) (a-b)³=a³-b³-3ab(a-b) (11) a³+b³ = (a+b)(a²-ab+b²) (12) a³+b³=(a+b)³-3 ab(a + b) (13) a³-b³= (a-b)(a²+ab+ b²) (14) a³-b³=(a-b)³ +3ab(a-b) (15) (a+b+c)²= a²+b²+c² +2ab+2bc+2ca (16) (a+b-c)²=a²+b²+c² +2ab-2bc-2ca (17) (a-b+c)²= a²+b²+c²-2ab-2bc+2ca (18) (a-b-c)²= a²+b²+c²-2ab+2bc-2ca (19) a² + b² = (a + b)² - 2ab (20) a² + b² = (a - b)² + 2ab (21) a² + b²=½ [(a+b)²-(a-b)²] (22) ab = ¼[(a+b)²- (a - b)²] (23) (a + b + c)³ = a³ + b³ + c³ + 3a²b + 3a²c + 3ab² + 3b²c + 3ac² + 3bc² + 6abc (24) (a + b - c)³ = a³ + b³ - c³ + 3a²b - 3a²c + 3ab² - 3b²c + 3ac² + 3bc² - 6abc (25) (a - b + c)³ = a³ - b³ + c³ - 3a²b + 3a²c + 3ab² + 3b²c + 3ac² - 3bc² - 6abc (26) (a - b - c)³ = a³ - b³ - c³ - 3a²b - 3a²c + 3ab²

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Harsh ..... 7 years, 5 months ago

(a+b)^2=a^2+2ab+b^2

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Write the coordinates of the origin.And shown in cartesian plane

Posted by Manoj Rao 7 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Bidyadhar Sahoo 7 years, 5 months ago

(0,0)

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How many lesson in mathematics with the chapter

Posted by Halai Faizan 7 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Anushka Ghosh 7 years, 5 months ago

It's about real numbers. Real numbers include natural numbers, whole numbers, integers, rational numbers and irrational numbers.

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9+4√5 -1

Posted by Rishank Sharma 7 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Yuvraj Rana 7 years, 5 months ago

8 + 4 under root 5

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How to locate√2 on number line

Posted by Aditi _Chouhan_ 7 years, 5 months ago

CBSE > Class 09 > Mathematics

0 answers

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0 pi

Posted by Rishank Sharma 5 years, 8 months ago

CBSE > Class 09 > Mathematics

3 answers

Aditi _Chouhan_ 7 years, 5 months ago

Kiska????

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Lakshya Goyal 7 years, 5 months ago

Tera sir

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Aditi _Chouhan_ 7 years, 5 months ago

What is this?????????

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Factorise x^3–23x^2+142x—120

Posted by Aditya Goyal 7 years, 5 months ago

CBSE > Class 09 > Mathematics

0 answers

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Give one example of bionomial of degree 35 and of a monomial of degree 100

Posted by Jay Joshi 7 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Rohit Jadon 7 years, 5 months ago

X-1 to the power 35 and xto the power 100

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if the polynomial 2x Cube + 9 X square + 3 x minus 5 and x cube + x square - 4 x + a leave the same remainder when divided by x minus 2. Find the value of a

Posted by Jatin Mittal 7 years, 5 months ago

CBSE > Class 09 > Mathematics

1 answers

Yashleen Kaur 7 years, 5 months ago

Hi palak mitial

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Define irrational numbers

Posted by Daaniyaa R 7 years, 5 months ago

CBSE > Class 09 > Mathematics

3 answers

Shourya Kashyap 7 years, 5 months ago

A number that cannot be expressed as a ratio between two integers and is not an imaginary number. If written in decimal notation, an irrational number would have an infinite number of digits to the right of the decimal point, without repetition. Pi and the square root of 2 (√2) are irrational numbers.

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Maahi Sharda 7 years, 5 months ago

In which the number non terminating and non repeating

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Yashleen Kaur 7 years, 5 months ago

the which are no in the form of p/q

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If x to the power 3 is equal to Y and Y to the power B equal to Z and z to the power C is equal to X then prove that ABC is equal to 1

Posted by Ravi Kumar 7 years, 5 months ago

CBSE > Class 09 > Mathematics