Question

value: 3
find f(x) + g(x)
f(x) = 8x³ - 7x + 4
g(x) = -5x³ + x - 8

a. 3x³ - 6x - 3
b. 13x² + 8x + 12
c. 3x³ - 6x - 4
d. 3x² - 8x - 4

Explanation:

Step1: Substitute given functions

$f(x)+g(x)=(8x^3 - 7x + 4)+(-5x^3 + x - 8)$

Step2: Group like terms

$=(8x^3-5x^3)+(-7x+x)+(4-8)$

Step3: Combine like terms

$=3x^3-6x-4$

Answer:

c. $3x^3 - 6x - 4$