Question

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Factor each.
7) f(x)=x4 – x² - 6
A) f(x) = (x² + 2)(x² – 3)
B) f(x) = (x² + 2)(x² + 4)
C) f(x) = (x² + 3)(x² – 3)
D) f(x) = (x2 + 4)(r? - 3)

Answer 1

Option A

Explanation:

Given function is,

`f(x)=x^4-x^2-6`

Hint:
`(-1=-3+2)` and
`(-3)(2)=-6`

`f(x)=x^4-3x^2+2x^2-6`

`=x^2(x^2-3)+2(x^2-3)`

`=(x^2+2)(x^2-3)`

`f(x)=(x^2+2)(x^2-3)` is the factored form of the given function.

Option A will be the correct option.