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OpenStudy (anonymous):
if x^2+y^2=200 and xy=40,then( x-y)^2=?
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OpenStudy (chosenmatt):
hi welcome to openstudy!!!
OpenStudy (anonymous):
thanx
ganeshie8 (ganeshie8):
Hint : \[(x-y)^2 = x^2+y^2 - 2xy\]
OpenStudy (anonymous):
thank you i got it
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