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Lady_Fox [76]
3 years ago
11

Is (x + 7) a factor of f(x) = x3 − 3x2 + 2x − 8

Mathematics
1 answer:
NNADVOKAT [17]3 years ago
8 0

Answer:

no

Step-by-step explanation:

If (x + h) is a factor of f(x) then f(- h) = 0

Thus if (x + 7) is a factor of f(x) then f(- 7) = 0

f(- 7) = (- 7)³ - 3(- 7)² + 2(- 7) - 8

        = - 343 - 147 - 14 - 8 = - 512 ≠ 0

Since f(- 7) ≠ 0 then (x + 7) is not a factor of f(x)

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