Answers

2016-07-11T16:08:07+08:00
(f.g)(x)=x^2-4+2=x^2-2
f(x)*g(x)=x^3+2x^2-4x-8

x^2-2=x^3+2x^2-4x-8
x^3+x^2-4x-6=0
x=2.15276, -1.57638 +/- 0.54968i
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