因式分解3x-12x³,x²+y²-1-2xy
问题描述:
因式分解3x-12x³,x²+y²-1-2xy
答
1、=3x(1-4x²)
=3x(1+2x)(1-2x)
2、=(x²-2xy+y²)-1
=(x-y)²-1
=(x-y+1)(x-y-1)