(2x + y)³ tolong jawab ya

= 2x^3+2x^2y+2xy^2+y^3
soal ini lebih mudah diselesaikan dg segitiga pascal

Jawab:
(2x - y)³
= (2x)³ + 3(2x)²(-y) + 3(2x)(-y)² + (-y)³
= 2³x³ + 3(2²x²)(-y) + 6xy² - y³
= 8x³ + (-3y)(4x²) + 6xy² - y³
= 8x³ - 12x²y + 6xy² - y³