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(-5x+7y)^2

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Answer to a math question (-5x+7y)^2

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Apply Perfect Square Formula $\left(a+b\right)^2=a^2+2ab+b^2$

$=(-5x)^{2}+2(-5x)\cdot 7y+(7y)^{2}$

Simplify $(-5x)^{2}+2(-5x)\cdot 7y+(7y)^{2}:{\quad}25x^{2}-70xy+49y^{2}$

$=25x^{2}-70xy+49y^{2}$

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