Question

x的三次方减y的三次方因式分解

x的三次方-y的三次方和x的三次方 y的三次方的因式分解
主要是x的三次方减去y的三次方的因式分解,

Answer 1

解
x³-y³
=(x-y)(x²+xy+y²)
x³+y³
=(x+y)(x²-xy+y²)