Question

dentity (x+ a) (x + b) = x2 + (a+b)x + ab to find the following produ
(i) (4x + 5) (4x + 1)
-3) (x+7)​

Answer 1

Answer:

$\: (4x + 5)(4x + 1) \\ = 4x {}^{2} + (5 + 1) \times 4x + 5 \times 1 \\ = 4x {}^{2} + 6 \times 4x + 5 \\ = 4x {}^{2} + 24x + 5$

Hope it helps you