Question

using identity solve (4x- 5) (4x- 1)

Answer 1

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

Answer 2

= (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.