解方程1/(xx-10x-29)+1/(xx-10x-45)=1/(xx-10x-69)

问题描述:

解方程1/(xx-10x-29)+1/(xx-10x-45)=1/(xx-10x-69)
X的平方打不出来.

设x²-10x-29=a
则1/a+1/(a-16)=1/(a-40)
两边通分,化简可得出a再算x
比较难算哈