Question

Select all the correct answers.

If f(x) = x2 − 3x − 4 and g(x) = x2 + x, what is (f + g)(x)?
2x2 − 2x − 4
2(x2 − x − 2)
x2 − x − 4
x2 − 1

Answer 1

There are 2 answers the first is 2x^2-2x-4 and the second is 2(x^2-x-2).

Explanation:

f(x) = x2 − 3x − 4 and g(x) = x2 + x.

Answer 2

f(x) + g(x) = 2x² - 2x - 4

f(x) + g(x) = 2(x² - x - 2)

Explanation:

f(x) = x² − 3x − 4 and g(x) = x² + x

f(x) + g(x) = x² − 3x − 4 + x² + x

f(x) + g(x) = 2x² - 2x - 4

f(x) + g(x) = 2(x² - x - 2)