分解因式法:(x-1)²-4=0(x-1+2)(x-1-2)=0(x+1)(x-3)=0x=-1或3公式法:(x-1)²-4=0x²-2x-3=0x=(-b±√(b^2－4ac))/2ax=3或-1配方法:(x-1)²-4=0x²-2x-3=0(x-3)(x+1)=0x=3或-1直接开平方法:(x-1)...