5/2x+4-1/2-x=4/x^2-4怎么做?
问题描述:
5/2x+4-1/2-x=4/x^2-4怎么做?
答
5/(2x+4)-1/(2-x)=4/(x²-4)
两边同乘以2(x+2)(x-2)
5(x-2)+2(x+2)=8
5x-10+2x+4=8
7x=14
x=2