# SOLUTION: i need help to factorize x^6 - 7x^3 -8 i know the answer its (x-2)(x+2x+4) (x^2-x +1) but i didnt understand how to solve the sum,please help and thanks

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 Question 154121: i need help to factorize x^6 - 7x^3 -8 i know the answer its (x-2)(x+2x+4) (x^2-x +1) but i didnt understand how to solve the sum,please help and thanksAnswer by stanbon(57361)   (Show Source): You can put this solution on YOUR website!i need help to factorize x^6 - 7x^3 -8 i know the answer its (x-2)(x+2x+4) (x^2-x +1) but i didnt understand how to solve the sum,please help and thanks ------------------- x^6 - 7x^3 -8 = (x^3-8)(x^3+1) The 1st factor is a difference of squares. The 2nd factor is a sum of squares. ----------------------- = (x-2)(x^2+2x+4)(x+1)(x^2-x+1) Cheeres, Stan H.