Question

Solve the product using suitable identity
(4x+5)(4x+3)

Answer 1

In this case, we cannot use identity to solve it because the terns enclosed in both brackets are not similar. Have a look on the general solution.

(4x+5) (4x + 3)

= 4x (4x+3) + 5 (4x+3)

= 16x² + 12x + 20x + 15

= 16x² + 32x + 15 [ANSWER]

Answer 2

◆Hey◆

°°Here is your answer°°

(4x+5)(4x+3)

In this the identity used is

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

So:

$16{x}^{2} + (5 + 3)x + 5 \times 3 \\ 16 {x}^{2} + 8x + 15$

【••Hope this helps••】