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katrin2010 [14]
3 years ago
10

Is (x+7) a factor of f(x) x3-3x2+ 2x-8?

Mathematics
1 answer:
Snowcat [4.5K]3 years ago
3 0

Answer:

(x+7) is not a factor

Step-by-step explanation:

we know that

If (x+7) is a factor of f(x)

then

For x=-7, f(-7)=0

Verify

we have

f(x)=x^{3}-3x^{2} +2x-8

Substitute x=-7

f(-7)=(-7)^{3}-3(-7)^{2} +2(-7)-8

f(-7)=-343-147 -14-8

f(-7)=--512

-512\neq 0

therefore

(x+7) is not a factor

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