Question

using suitable identity find the following product (4x+5)(4x-1)​

Answer 1

(a+b) (a-b). Hope this helps you
Kindly mark me as brainlist

Answer 2

Answer:

16$x^{2}$ + 16x - 5

Step-by-step explanation:

We will use the following identity:

(x + a)(x + b) = $x^{2}$ + x(a + b) + ab

Here, x = 4x

         a = 5

         b = -1

∴ (4x + 5)(4x - 1)​ = $(4x)^{2}$ + 4x[5 + (-1)] + (5)(-1)

                          = 16$x^{2}$ + 4x(5 - 1) - 5

                          = 16$x^{2}$ + 16x - 5