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Question Number 10572 by j.masanja06@gmail.com last updated on 18/Feb/17
factorise x^3 + 1
factorisex3+1
Answered by sandy_suhendra last updated on 18/Feb/17
=(x+1)(x^2 −x+1)
=(x+1)(x2−x+1)
Commented by FilupS last updated on 19/Feb/17
x^3 +1=x^3 −x^2 +x^2 −x+x+1 x^3 +1=x^2 (x−1)+x(x−1)+x+1 x^3 +1=??? x^3 +1=(x−1)(x^2 −x+1) Please help
x3+1=x3−x2+x2−x+x+1x3+1=x2(x−1)+x(x−1)+x+1x3+1=???x3+1=(x−1)(x2−x+1)Pleasehelp
Commented by prakash jain last updated on 19/Feb/17
x^3 +1=x^3 +x^2 −x^2 −x+x+1 =x^2 (x+1)−x(x+1)+1(x+1) =(x+1)(x^2 −x+1)
x3+1=x3+x2−x2−x+x+1=x2(x+1)−x(x+1)+1(x+1)=(x+1)(x2−x+1)
Commented by FilupS last updated on 19/Feb/17
ahh I grouped the wrong terms thanks
ahhIgroupedthewrongtermsthanks

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