Question

Explain this and what method? Is it linear combos or some sort of GCF finding

Answer 1

GCF means greatest common factor

Answer 2

just subtracting the expression for revenue from the expression for cost

Explanation:

2x^3 + 30x - 130

- 2x^3 - 3x - 520

(subtracting means adding the opposite)

2x^3 - 2x^3 = 0

30x - (-3x) = 33x

-130 - (-520) = 390