因式分解x4-2y4-2x3y+xy3=(x-2y)(x3+y3)为什么 =(x-2y)(x+y)(x2-xy+y2)要过程的详解
问题描述:
因式分解x4-2y4-2x3y+xy3=(x-2y)(x3+y3)为什么 =(x-2y)(x+y)(x2-xy+y2)要过程的详解
答
x^4-2y^4-2x³y+xy³=x^4-2x³y+xy³-2y^4……(用加法交换律)=x³(x-2y)+y³(x-2y)……………(提取公因式)=(x-2y)(x³+y³)…………………(提取公因式)=(x-2y)(x+y)(x...