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Q.

Find the Quadratic equation for x

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a

0

b

-1

c

-a

d

3

answer is C.

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Detailed Solution

We are given to solve the quadratic equation

Here the product of the coefficients of the first and last term is

. So the middle term ax must be divided in such a way that the product of the coefficients of the divided terms must be equal to 2. So the equation can be written as

From the first two terms of the above equation, taking out ‘2x’ common and from the last two terms taking out ‘a’ common we get
Question Image

The left-hand side of the above equation is a product which is equal to zero. So either the first term or the second term or both terms must be zero.
This gives,

The values of x are

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