Will mark
devon wanted to know if x-3 is a factor of f(x)=x^3+x^2-10x+8. she applied the factor theorem and concluded that x-3 is not a factor of f(x), as shown in the following work.
f(-3)^3+(-3)^2-10(-3)+8=20
f(-3)=20, so the remainder is 20.
the remainder is 20, so x-3 is not a factor of f(x).
did devon make a mistake? if so, what was her mistake?
a. yes, devon evaluated f(-3) incorrectly.
b. no, devon did not make any mistakes.
c. yes, devon should have evaluated f(3)