因式分解.x²-9. m³-4m. 5﹙m-n﹚²-m﹙n-m﹚=﹙m-n﹚_____. xy²-2xy+x.
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.
答
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)