6分之(负6加减4根号3)
3x²+6x=1x²+2x=1/3x²+2x+1=4/3(x+1)²=12/9x+1=±2√3/3 x=-1+2√3/3 x=-1-2√3/3
3x²+6x-1=0 x²+2x=1/3 x²+2x+1=4/3 (x+1)²=4/3所以x1=2√3/3-1 x2=-2√3/3-1
你好!