Question

(4x+5)^2 -80x =(4x-5)^2 .. Which identity is used​

Answer 1

Answer:

FORMULA ==(x+a)(x+b)=x²+(a+b)x+ab

Step-by-step explanation:

= (4x-5)(4x-1)

FORMULA ==(x+a)(x+b)=x²+(a+b)x+ab

                     x=4x;a=-5;b=-1

=(4x)²+(-5+(-1))4x+(-5)(-1).

=16x²-5-1*4x-5*(-1)

=16x²-24x+5.

HOPE THIS HELPS U.

Answer 2

Answer:

We use the identity a²-b²