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Mathematics
OpenStudy (anonymous):

Factor (c+d)^2-7(c+d)-18

OpenStudy (agreene):

\[(-9 + c + d) (2 + c + d)\]

OpenStudy (anonymous):

remove the brackets

OpenStudy (anonymous):

for first term use the formula (a+b)^2

OpenStudy (anonymous):

\[d ^{2}+2cd-7d+c ^{2}-7c-18\]

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