1.把下列各式进行因式分解
(1)x-xy²
(2)2a³-50ab²
(3)9x³-18x²+9x
(4)ax²+2a²x+a³
1.把下列各式进行因式分解
(1)x-xy²
(2)2a³-50ab²
(3)9x³-18x²+9x
(4)ax²+2a²x+a³
(1)x-xy²=x(1-y)(1+y)
(2)2a³-50ab²=2a(a²-25b²)=2a(a+5b)(a-5b)
(3)9x³-18x²+9x=9x(x²-2x+1)=9x(x-1)²
(4)ax²+2a²x+a³=a(x²+2ax+a²)=2a(x+a)²
(1)原式=x(1-y²)=x(1-y)(1+y)
(2)原式=2a(a²-25b²)=2a(a-5b)(a+5b)
(3)原式=9x(x²-2x+1)=9x(x-1)²
(4)原式=a(x²+2ax+a²)=a(x+a)²