Question

using identity (x+a)(x+b)=(x)2+(a+b)x +ab term (4x+5)(4x-1)​

Answer 1

Answer:

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

using Identity

X =4x. A= 5. B = -1.

putting values

(4x)sq +(5-1)4x+5*-1

16x sq.+16x+-5

thanks