Question

(a-b)^²-(a+b)^²=?

what is the ?answer​

Answer 1

$(a - b) {}^{2} - (a + b) {}^{2}$

Now apply

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

Here, a = (a - b), b = (a + b)

Now on putting value we get

((a - b) + (a + b)) ((a - b) - (a + b))

(a - b + a + b) (a - b - a - b)

(2a)(-2b)

-4ab

Thanks