Question

5. What is a cubic polynomial function in standard form with zeros 1, -2, and 2?

A f(x)= x3 + x2 – 3x + 4
B f(x)=x2 + x2 - 4x – 2
C f(x)=x + x2 + 4x +4
D f(x)=x²-x2 - 4x + 4


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Answer 1

D

Explanation:

we're given the three zeros of a cubic polynomial

`f(x) = (x-1)(x+2)(x-2)\\f(x) = (x-1)(x^2-4)\\f(x) = x(x^2) - 4x - x^2 + 4\\f(x) = x^3 - x^2 - 4x + 4`