Question

b (x + 7)(x + 9) = (x+3)(x + 21)​

Answer 1

Step-by-step explanation:

$\Huge\underline{\underline{\sf ANSWER}}\\ (x + 7)(x + 9) = (x + 3)(x + 21) \\ {x}^{2} + 16x + 63 = {x}^{2} + 24x + 63 \\ 24x - 16x = 0 \\ 8x = 0 \\ x = 0 \\ \\ verification.... \\ (x + 7)(x + 9) = (x + 3)(x + 21) \\ (7)(9) = (3)(21) \\ 63 = 63 \\ verified..$