Question

F(x)= 7x^5+35x^4-2x^3-4x^2+30x+8
find f(-5)

Answer 1

8

Explanation:

When you are told to find f(-5), that means that you are to sub in a -5 for every x you see. That -5 could be any number or expression. Subbing in a -5 looks like this:

`7(-5)^5+35(-5)^4-2(-5)^3-4(-5)^2+30(-5)+8`

Be careful with all those negatives. Doing the math on that gives you that f(-5) = 8