SOLUTION: please help me solve Is x-3 a factor of f(x)= 2x^3 - 10x^2 + 8x + 15​?

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Question 1145458: please help me solve
Is x-3 a factor of
f(x)= 2x^3 - 10x^2 + 8x + 15​?
Found 2 solutions by Alan3354, josgarithmetic:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
please help me solve
Is x-3 a factor of
f(x)= 2x^3 - 10x^2 + 8x + 15​?
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If x-3 is a factor, then
f(3) = 0
o/w not.

Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
----------------------------------
Is x-3 a factor of
f(x)= 2x^3 - 10x^2 + 8x + 15​?
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Is x=3 a zero or root of f?

2%2A3%5E3-10%2A3%5E2%2B8%2A3%2B15
Is this 0 or non-zero?

54-90%2B24%2B15
3
-
NO.
x-3 is not a factor of f.