Question

add.
(7x^2 - 6x + 17)+(4x^2 + 9x - 79)

the answer is
(simplify your answer.)

Explanation:

Step1: Combine like - terms of $x^2$

$(7x^{2}+4x^{2})+( - 6x + 9x)+(17-79)$
$=(7 + 4)x^{2}+( - 6 + 9)x+(17-79)$
$=11x^{2}+3x+(17 - 79)$

Step2: Combine the constant terms

$11x^{2}+3x+(17 - 79)=11x^{2}+3x - 62$

Answer:

$11x^{2}+3x - 62$