One factor of x4 + x2 - 20 is x2 + 5. The other factor is A. x2 - – InterviewSolution

InterviewSolution

1.

One factor of x4 + x2 - 20 is x2 + 5. The other factor is A. x2 - 4 B. x - 4 C. x2 - 5 D. x + 2

Answer»

f (x) = x⁴ + x² - 20

(x² + 5) (x² - 4)

Therefore,

(x² + 5) and (x² - 4) are the factors of f(x)

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