If $(x - y) = 15$ $(x-y)= 15$ , what is the value of $x^{2} - 2 x y + y^{2}$ $x^2-2xy+y^2$ ?

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$x^{2} - 2 x y + y^{2}$ $x^2 -2xy+ y^2$

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Answer 1 · 2017-03-23T13:22:34

$x^{2} - 2 x y + y^{2} = {(x - y)}^{2} = 15^{2} = 225$ $x^2-2xy+y^2=(x-y)^2=15^2=225$