首页 > 留学知识库

问题: 八年级分式方程

如图

解答:

左边 = [1-5/(x-3)]-[1-5/(x-4)]
右边 = [1-1/(x+8)]-[1-1/(x+3)]

--->5/(x-4)-5/(x-3) = 1/(x+3)-1/(x+8)
--->5/[(x-4)(x-3)] = 5/[(x+3)(x+8)]
--->x²-7x+12 = x²+11x+24
--->18x = -12
--->x = -2/3 (检验...)