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Expand $ (x-y)^{2}-2(x-y)
Given:
\( (x-y)^{2}-2(x-y) \).
To do:
We have to expand \( (x-y)^{2}-2(x-y) \).
Solution:
We know that,
$(a-b)^2=a^2-2ab+b^2$
$(x-y)^{2}-2(x-y)=x^2-2xy+y^2-2x-2(-y)$
$=x^2+y^2-2xy-2x+2y$
Therefore,
$(x-y)^{2}-2(x-y)=x^2+y^2-2xy-2x+2y$.
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