x^2-10x-1=0
问题描述:
x^2-10x-1=0
答
x^2一1ox+25=26
(x一5)^2=26
x一5=±√26
x=5土√26
x^2-10x-1=0
x^2一1ox+25=26
(x一5)^2=26
x一5=±√26
x=5土√26