Question

what is the simplified form of this expression?
(3x² + 5x - 8) + (5x² - 13x - 5)
a. 8x² - x - 13
b. 8x² + 8x - 13
c. 8x² - 8x - 13
d. 8x² - 8x + 13

Explanation:

Step1: Combine $x^2$ terms

$3x^2 + 5x^2 = 8x^2$

Step2: Combine $x$ terms

$5x - 13x = -8x$

Step3: Combine constant terms

$-8 - 5 = -13$

Step4: Assemble simplified expression

$8x^2 - 8x - 13$

Answer:

C. $8x^2 - 8x - 13$