SOLUTION: x^4-5x^3+12x^2-5x-2 factorise it

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Question 13155: x^4-5x^3+12x^2-5x-2
factorise it
Answer by uksraj(9) About Me  (Show Source):
You can put this solution on YOUR website!
f(x)=x^4-5x^3+12x^2-5x-2
f(-1)=-1^4-5(-1)^3+12(-1)^2-5(-1)-2
=1+5-12+5-1#0