Answer: -46
Explanation:
First f-g (since its in parenthesis)
f(x)=3x^5+6x^2-5
- g(x)=3x^5-5x^4-15
= 0 -5x^4 +6x^2 + 10
then, sub in 2 for x
(-5x^4 +6x^2 + 10); x=2
-5(2)^4 + 6(2)^2 + 10 = -46
*can only subtract terms with the same power
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