SOLUTION: Factor the polynomial f(x). The solve the equation f(x)=0. {{{f(x)=x^3-3x^2-18x+40}}}

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Factor the polynomial f(x). The solve the equation f(x)=0. {{{f(x)=x^3-3x^2-18x+40}}}       Log On


   

Question 883390: Factor the polynomial f(x). The solve the equation f(x)=0.
f%28x%29=x%5E3-3x%5E2-18x%2B40
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
f%28x%29=x%5E3-3x%5E2-18x%2B40
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graph%28300%2C300%2C-6%2C6%2C-6%2C6%2Cx%5E3-3x%5E2-18x%2B40%29
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f%28x%29=%28x-2%29%28x%2B4%29%28x-5%29
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x-2=0
x=2
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x%2B4=0
x=-4
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x-5=0
x=5