Question

please answer this...
anyone please tell why didn't they took (x-1/4x)^2 ...why not (x+1/4x)^2...

please explain me...

Answer 1

when we have take positive and negative value it's change your answer

Answer 2

Because

You can see there
$- \frac{1}{2}$
So there will be
$(x - \frac{1}{4x} )^{2}$

Hope it will help you .