Given x (x-1) - (xx-y) = - 3, find xx + yy-2xy | Math enthusiast | Mathematical art

Given x (x-1) - (xx-y) = - 3, find xx + yy-2xy

It is known that x (x-1) - (X & # 178; - y) = - 3
Then x & # 178; - x-x & # 178; + y = - 3
x-y=3
So x & # 178; + Y & # 178; - 2XY = (X-Y) &# 178; = 3 & # 178; = 9

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