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Mathematics 15 Online
OpenStudy (anonymous):

factor 7x^2+9k

OpenStudy (igreen):

Do you have any choices? @hahahahahaggard

OpenStudy (unklerhaukus):

\[7x^2+9k = (√7x)^2 +(3√k)^2\\ \qquad\qquad = (\dots+\cdots)(\dots-\cdots)\]

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