Question

x/y + y/x = -1 (x, y = not zero. Find x^3 -Y^3

Answer 1

x sq.+y sq.= - xy

x sq.+y sq. + xy =0 _________1 equation

x cube - y cube = (x-y)(x sq. + xy + y sq.)

put (x sq. + xy + y sq.)=0

x cube -y cube = (x-y) × 0