因式分解.x²-9. m³-4m. 5﹙m-n﹚²-m﹙n-m﹚=﹙m-n﹚_____. xy²-2xy+x.a³-ab². a﹙x-y﹚-b﹙y-x﹚+c﹙x-y﹚. 2x²-18.

问题描述:

因式分解.x²-9. m³-4m. 5﹙m-n﹚²-m﹙n-m﹚=﹙m-n﹚_____. xy²-2xy+x.
a³-ab². a﹙x-y﹚-b﹙y-x﹚+c﹙x-y﹚. 2x²-18.

因式分解。
x²-9.=(x+3)(x-3)
m³-4m. =m(m+2)(m-2)
5﹙m-n﹚²-m﹙n-m﹚=﹙m-n﹚(6m-n)
xy²-2xy+x. =x(y²-2y+1)=x(y+1)(y-1)a³-ab². =a(a²- b²)=a(a+b)(a-b) a﹙x-y﹚-b﹙y-x﹚+c﹙x-y﹚=(x-y)(a+b+c). 2x²-18.=2(x²-9)=2(x+3)(x-3)

x²-9=(x+3)(X-3).
m³-4m=m(M+2)(M-2)
5﹙m-n﹚²-m﹙n-m﹚=﹙m-n﹚(6M-N)
xy²-2xy+x.=X(Y-1)²
a³-ab².= a(a+b)(a-b)
a﹙x-y﹚-b﹙y-x﹚+c﹙x-y﹚.=(x-y)(a+b+c)
2x²-18.=2(x+3)(x-3)