Question

using the sutebal identities (4x+5) (4x-1)​

Answer 1

Answer:

Hope it helps you.....✌✌

Answer 2

Answer:

using identity ; (x+a) (x+b) = x^2 + (a+b)x + ab

therefore,  (4x+5) (4x-1) = (4x)^2 + [5+(-1)] 4x + 5*(-1)

                                      = 16x^2 + 16x - 5

hope it helps !!!!