Question

How do you use synthetic substitution to find f(3) and f(-2) for `f(x)=x^4-5x+2`?

Answer 1

f(3)= 68; f(-2)= 28

Explanation:

Substitute x by 3 to get f(3) and -2 to get f(-2).

Accordingly, f(3)= `3^4 -5(3) +2=68`

and f(-2)= `(-2)^4 -5(-2) +2 = 28`

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