Factor by grouping. A) t^3-t^2+t-1

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pramodpandey | College Teacher | (Level 3) Valedictorian

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We have given

 t^3-t^2+t-1

so

`t^3-t^2+t-1= t^2(t-1)+1(t-1)`

`=(t-1)(t^2-1)`

`=(t-1)(t-1)(t+1)`

bcause we can write

`A^2-B^2=(A-B)(A+B)`

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