6x²-x-12=0各项除以6x²-x/6-2=0x²-x/6+(1/12)²=2+(1/12)²(x-1/12)²=2+1/144(x-1/12)²=288/144 +1/144(x-1/12)²=289/144两边开方x-1/12=±17/12x=3/2 或x=-4/3谢谢,祝你学习进步!