Question

Which is a factor of 144 − 49x2? 12 - 7x2 72 – 7x2 12 – 7x 72 7x

Answer 1

The factor of the given equation will be  $(12+7x)(12-7x)$

What will be the factor of the given equation?

The given expression is

$=144-7x^2$

Now we can also write this

$=(12^2-7x^2)$

By using the formula

$(a^2-b^2)=(a+b)(a-b)$

Now form the above formula

$=(12+7x)(12-7x)$

Thus the factor of the given equation will be  $(12+7x)(12-7x)$

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