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priscilla98
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Homework Statement
The set of zeros of f (x) = x^3 + 4x^2 + 4x is
A) {-2}
B) {0, -2}
C) {0, 2}
D) {2}
E) {2, -2}
2. The attempt at a solution
f (x) = x^3 + 4x^2 + 4x
f (x) = (x^2 + 2x)(x + 2)
f (x) = x(x + 2)(x + 2)
x = 0 and x = -2. Is the answer B?