If x/y +y/x = -1 , then find the value of x 3 - y 3 .
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x/y +y/x =-1
x^2 + y^2 = -xy
x^2 + y^2 + xy= 0
x3 - y3 = (x-y)(x^2 +y^2 +xy)
= (x-y)(0)
= 0
x^2 + y^2 = -xy
x^2 + y^2 + xy= 0
x3 - y3 = (x-y)(x^2 +y^2 +xy)
= (x-y)(0)
= 0
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