Question

Prove the following identity :
(x3 - y3 ) = (x-y)(x2 + xy +y2)

x3 = x cube
y3 = y cube

Answer 1

taking RHS
x(x2+xy+y2)-y(x2+xy+y2)
x3+x2y+xy2-x2y-xy2-y3
x3-y3

Answer 2

thank you so much shehryar

Answer 3

@aashia
It is not your place to demand an answer to your question because you have failed to plan. People here are volunteers helping in THEIR time
@shehryar it is against the code of conduct to give direct answers like that - you should guide the asker to the answer - maybe left your answer after the first line for her to expand and simplify?

Answer 4

sorry mr nood

Answer 5

@Unkle

Thanks for the idea

Answer 6

now subtract the y^3

Answer 7

nice graphics!