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Mathematics 8 Online
OpenStudy (anonymous):

Factor z 3 - 2z 2 + 9z - 18.

OpenStudy (acxbox22):

z^2(z-2) + 9(z-2)= (z^2+9)(z-2)

OpenStudy (anonymous):

what!?

OpenStudy (acxbox22):

factor z^2 from the first 2 terms then factor 9 from the last 2 terms

OpenStudy (acxbox22):

this method is called factoring by grouping

OpenStudy (anonymous):

oh...thx

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