分解因式：(2a-b)²+2a-b 2（x-1)²-x+1 9(x+y)²-4(x-y)²
问题描述：
分解因式：(2a-b)²+2a-b 2（x-1)²-x+1 9(x+y)²-4(x-y)²
还有 (x+y)²-4(x+y-1) 4x²-25 -x²+2x-1 这些
答
(2a-b)²+2a-b =(2a-b)[(2a-b)+1]=(2a-b)(2a-b+1)2（x-1)²-x+1=2(x-1) ²-(x-1)=(x-1)[2(x-1)-1]=(x-1)(2x-2-1)=(x-1)(2x-3)9(x+y)²-4(x-y)²=[3(x+y)+2(x-y)][3(x+y)-2(x-y)]=(3x+3y+2x-2y)(...还有两题帮忙解一下 x的三次方-x²-4x+4 16+8xy-16x²-y²x³-x²-4x+4
=x²(x-1)-4(x-1)
=(x-1)(x²-4)
=(x-1)(x+2)(x-2)
16+8xy-16x²-y²
=16-(16x²-8xy+y²)
=16-(4x-y)²
=(4+4x-y)(4-4x+y)