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Mathematics 22 Online
OpenStudy (anonymous):

Which of the following is a factor...

OpenStudy (anonymous):

OpenStudy (blockcolder):

That expression can be factored as follows: \[3x^2y+7x^2-9y-21=x^2(3y+7)-3(3y+7)\] \[=(x^2-3)(3y+7)\] Thus the answer is definitely x^2-3.

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