4x+x²=5.问,x等于几?
问题描述:
4x+x²=5.问,x等于几?
答
x^2+4x-5=0
(x+5)(x-1)=0
x1=-5
x2=1
4x+x²=5.问,x等于几?
x^2+4x-5=0
(x+5)(x-1)=0
x1=-5
x2=1