Answer:
I think 5 and 7 I got that question
The formula to find the area of a triangle is

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There’s no image shown can u attach one
F(2)=2(3*2)+1
f(2)=2(6)+1
=13
answer is 13
20x^4-39x^3-16x
Make sure to multiply all the terms by each other in the two parentheses