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Mathematics 15 Online
OpenStudy (anonymous):

(0.9y^2-0.0049)

OpenStudy (anonymous):

0.9(2y)

OpenStudy (anonymous):

thats not the answer i got...

OpenStudy (anonymous):

(0.9y+0.07)(0.9y-0.07)

OpenStudy (anonymous):

\[(0.9y+0.07)(0.9y-0.07)=0.81 y^2-0.0049 \]

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