SOLUTION: what are the real zeros of f(x)=x4+2x^3+x^2-4

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Question 462976: what are the real zeros of
f(x)=x4+2x^3+x^2-4
Answer by robertb(5830) About Me  (Show Source):
You can put this solution on YOUR website!

==> The real roots of f(x) are 1, -2.