解方程:x²-4x+3.5=0
问题描述:
解方程:x²-4x+3.5=0
答
x^2-4x+3.5=0
x^2-4x+4=4-3.5
(x-2)^2=1/2
x-2=±√2/2
x=2±√2/2.