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OpenStudy (anonymous):
Can someone help me? I'm supposed to find the zeros for this example: f(x) = x^3 + 2x^2 - 4x - 8. The answer said pos/neg 2... I don't understand how that would be the answer.. :/
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OpenStudy (anonymous):
I tried to do it by breaking it apart, and factoring two groups. And I got x^2(x+2), -4(x+2), so I don't get how he got +-2.
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