Jawabanmu

2014-08-26T19:49:08+07:00
((x - y) (x - y)) (x - y)
= (x² - xy - xy + y²) (x - y)
= (x² - 2xy + y²) (x - y)
= x³ - x²y - 2x²y + 2xy² + xy² - y³
= x³ - 3x²y + 3xy² - y³