CBSE > Class 12 > Mathematics | CBSE Board | Homework Help

Step 1: Write the quadratic in the correct form, it must be in descending order and equal to zero.
Step 2: Fill in the first blank by taking the coefficient (number) from the x-term (middle term) and cutting it in half and squaring it. Fill in the second blank with the same number. In this case:
Step 3: Factor the part in parenthesis and combine like terms for the numbers outside of the parenthesis. Note: The part in parenthesis will always factor into half of the coefficient (number) from the x-term (middle term). In this case, half of +8 is +4.
Step 4: Now you are done completing the square and it is time to solve the problem. First add 12 to both sides.
Step 5: Use the square root property and take the square root of each side, don’t forget the plus or minus.
Step 6: Subtract 4 from each side.
Step 7: Check to determine if you can simplify the square root, in this case we can. So the final answer is:

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Find general solution of dy/dx=sin^1 x

Posted by Sheenu Super Star Star 7 years ago

CBSE > Class 12 > Mathematics

0 answers

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Find dy/dx ify=tan inverse a+x/1-ax

Posted by Shweta Yadav 7 years ago

CBSE > Class 12 > Mathematics

0 answers

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How much part of ncert covered in board examination of class 12??

Posted by Pritam Singh 7 years ago

CBSE > Class 12 > Mathematics

2 answers

Aryan Rai 7 years ago

I think if you want to score 100 then NCERT and NCERT EXAMPLER will be sufficient.

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Mansi Sharma 7 years ago

80 to 85% marks cover ncert portion ....and remaining 15 to 20% Other books like RD sharma and may be Xam idea or some othr books also .

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Taninverseroot3-cotinverseroot4

Posted by Vicky Singh 7 years ago

CBSE > Class 12 > Mathematics

1 answers

Nehal Mehta 7 years ago

Tan^-1(√3) - cot^-1(√4) = tan^-1(√3) - tan ^-1(1/√4) [tan^-1(A) - tan^-1(B) = tan^-1(A - B/ 1+AB] = tan^-1( √12 - 1/√4 - √3) = tan^-1 ( √12 -1/√4 - √3 × √4 + √3/ √4 + √3) = tan^-1 (4√3 - √4 + 6 - √3)

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Consider f: R+: [-9,infinity) given by f(x)=5x^2+6x-9 PRove that f is invertible with (y)= (√54+5y-3 /5) Answer with full solvation

Posted by Preet Bhullar 7 years ago

CBSE > Class 12 > Mathematics

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f(x) = x^2+3x+1,g(x)=2x-3 and find the fog and Gof ?

Posted by Preet Bhullar 7 years ago

CBSE > Class 12 > Mathematics

5 answers

Srivinayak V 7 years ago

If fog then in f(x)=x^2+3x+1, in place x put 2x-3.... ie, (2x-3)^2+3(2x-3)+1 then solve it... If gof... then g(x)= 2x+3 in place of x put x^2+3x+1 ie , 2(x^2+3x+1)+3 solve I hope u understand....?

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Preet Bhullar 7 years ago

How we can solve it ?

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Srivinayak V 7 years ago

Dsdo?

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Preet Bhullar 7 years ago

Solvation dsdo

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Srivinayak V 7 years ago

Fog = 4x^2-6x+1 Gof = 2x^2+6x+5

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Defferntation of 1-asinα

Posted by Avish Jain 7 years ago

CBSE > Class 12 > Mathematics

1 answers

Sneha Bansal 7 years ago

Differentiation of 1-asin(alpha) w.r.t. alpha is - acos (alpha)

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Three balls are drawn one by one without replacement from a bag containing 5 white and 4 green balls.Find the probability distribution of number of green balls drawn

Posted by Anjali Pandey 7 years ago

CBSE > Class 12 > Mathematics

0 answers

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Y=e^x+e^x+e^x+......

Posted by Abhishek Saini 7 years ago

CBSE > Class 12 > Mathematics

1 answers

Mansi Sharma 7 years ago

What do u want in this que` .....

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Sinxcosx maximum value

Posted by Yash Sharma 5 years, 8 months ago

CBSE > Class 12 > Mathematics

0 answers

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What is second order derivative of cosec inverse x

Posted by Azib Mirza 7 years ago

CBSE > Class 12 > Mathematics

0 answers

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Vicosa DY DX is equal to x Cos DY by DX answer de fatafat

Posted by Chitu Chitu 7 years ago

CBSE > Class 12 > Mathematics

1 answers

Srivinayak V 7 years ago

???didnt understand the question....

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Which book will be more suitable RD Sharma or ncert exampler?

Posted by Palak Koshta 7 years ago

CBSE > Class 12 > Mathematics

1 answers

Aryan Rai 7 years ago

Since there is very little time left, so go with NCERT exampler. But see chapters like ITF, Vector,3D from RD Sharma because NCERT has nothing much to offer for these chapters as said by my Maths school teacher.

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A speaks truth in 85% of the cases and B in 70% of the cases .in what percentage of cases are they likely to contract each other in stating some fact.

Posted by Diksha Gautam 7 years ago

CBSE > Class 12 > Mathematics