因式分解：解方程 4x²=（3x-1）²

4x²-(3x-1)²=0(2x+3x-1)(2x-3x+1)=0(5x-1)(-x+1)=0x=1/5 x=11.a²-b²-4a-4b=(a+b)(a-b)-4(a+b)=(a+b)(a-b-4)2.m²-4mn+4n²-4=(m-2n)^2-4=(m-2n+2)(m-2n-2)3.4-x²-2xy-y²=4-(x...