Description
Find the zeros of the polynomial function.
f(x) = x3 + 3x2 - x - 3
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Explanation & Answer
x^3 + 3x^2 - x - 3 = 0
x^2(x + 3) - 1(x + 3) = 0
(x^2 - 1)(x + 3) = 0
x^2 - 1 = 0
x^2 = 1
sqrt(x^2) = +/- sqrt(1)
x = 1 or -1
or
x+3 = 0
x = -3
Zeros: x = -1 , 1 , 3
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