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Mathematics 9 Online
OpenStudy (anonymous):

(r+9s)^2 is the answer r^2+18rs+81s^2?

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

thanks :)

OpenStudy (anonymous):

open it with the following formula (x+y)^2= (x^2+y^2+2xy) and yeah your answer is right

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