解方程1/2-x -1=1/x-2 - 6-x/3x-12
问题描述:
解方程1/2-x -1=1/x-2 - 6-x/3x-12
答
把1/x-2移项得:1/(2-x) - 1/(x-2)-1=-(6-x)/(3x-12)同等于1/(x-2)+1/(x-2)+1=1/3*(6-x)/(x-4)得:2/(x-2)+1=1/3(6-x)/(x-4)两边都乘以(x-4)*(x-2)得2*(x-4)+(x-4)*(x-2)=1/3(6-x)*(x-2)得X平方-5x+3=0.对X有什么条件没有.