Question

Stevin product Calculate (x + 9) (x + 12): a)x² - 21x - 108 b)x² - 21x + 108 c)x² + 21x + 108 d)x² + 21x - 108 e)x² - 21x - 108

Answer 1

Answer:

The answer is C.

Step-by-step explanation:

You have to apply Distributive Law :

$a(m + n) = am + an$

So for this question :

$(x + 9)(x + 12)$

$= x(x) + x(12) + 9(x) + 9(12)$

$= {x}^{2} + 12x + 9x + 108$

$= {x}^{2} + 21x + 108$