用配方法解下列方程 3(x-2)²-6=0 3x²+1=-4x 2(x+1)²-6=0 2x²+=-3x
问题描述:
用配方法解下列方程 3(x-2)²-6=0 3x²+1=-4x 2(x+1)²-6=0 2x²+
=-3x
答
3(x-2)²-6=0(x-2)²=2x-2=±√2X1=2+√2,X2=2-√2;3x²+1=-4x 3x²+4x+1=0x²+4/3x+1/3=0(X+2/3)²-4/9+1/3=0(X+2/3)²=1/9X+2/3=±1/3X1=-1/3,X2=-12(x+1)²-6=0 (x+1)²...