杭州交通信息网如何用筷子做弓箭:一道数学题
来源：百度文库 编辑：杭州交通信息网 时间：2024/05/07 16:34:03
x/(x^2-25)-5/(x^2+10x+25)
原式
=x/(x+5)(x-5)-5/(x+5)(x+5)
=[x(x+5)-5(x-5)]/[(x+5)(x+5)(x-5)]
=(x^2+25)/[(x+5)(x+5)(x-5)]
原式
=x/(x+5)(x-5)-5/(x+5)(x+5)
=[x(x+5)-5(x-5)]/[(x+5)(x+5)(x-5)]
=(x^2+25)/[(x+5)(x+5)(x-5)]