x+y=2xy x-y=6xy by substion
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Answer:
Step-by-step explanation:
x-y=2
x^3-y^3=6xy
=[x-y][x^+y^2+xy]-6xy
=2[x^2+y^2+xy]-6xy
=2x^2+2y^2-4xy
=2[x^2+y^2-2xy]
=2[x-y]^2
=2*[2]^2
=2*4
=8
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