10x+x^2-100=0,求x

2025-12-17 05:55:06
推荐回答(1个)
回答1:

x^2+10x-100=0
x^2+10x=100
x^2+10x+25=125
(x+5)^2=125
x+5=±5√5
x=5√5-5 x=-5√5-5