Question

Simplify (2x+5)² - (2x-5)².
plzz fast

Answer 1

56666

776666

7877767655

Answer 2

(2x+5)² - (2x-5)²

From a² - b² = (a+b) (a-b),

we have,

{2x+5+(2x-5)} {2x+5-(2x-5)}

Here, a = 2x + 5

and ,

b = 2x - 5.

So,

= (2x+5+2x-5) (2x+5-2x+5)

= ( 4x ) × (10)

= 40x.

So, the simplified answer is 40x.