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OpenStudy (anonymous):
is x squared - x divisible by 3
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OpenStudy (anonymous):
no. x^2-x=x(x-1)
OpenStudy (anonymous):
take for example x=8. U get 8*7=56. 56 is not divisible by 3.
OpenStudy (unklerhaukus):
\[\large3|(x^2-x)\iff3|[x(x-1)]\implies 3|x~\lor~3|(x-1)\]
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