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OpenStudy (anonymous):
Expand: (2x-5y)^2
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OpenStudy (anonymous):
4 x^2-20 x y+25 y^2
OpenStudy (anonymous):
\[(x-y)^2=x^2-2xy+y^2\] \[(2x-5y)^2=(2x)^2-2(2x)(5y)+(5y)^2\] \[=4x^2-20xy+25y^2\]
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