Question

WILL GIVE MEDALS!!!

Is x - 8 a factor of the function f(x) = -2x³ + 17x² - 64? Explain

Answer 1

find f(8)
if it is 0 then x-8 is a factor.

Answer 2

oh okay!

Answer 3

how do I do that?

Answer 4

@INeedSomeHelp!

Answer 5

Ok

Answer 6

you need to do long division

Answer 7

no it is not because there is a remainder of 8

Answer 8

\[f(8)=-2(8)^3+17(8)^2-64=8^2\left( -2*8+17-1 \right)=64*0=0\]
hence x-8 is a factor of f(x)

Answer 9

hmm okay! thanks everyone!!!