x²-3x+1=0怎么做 x²-3x+1=0怎么做 x²-3x+1=0怎么做 x²-3x+1=0怎么做
问题描述:
x²-3x+1=0怎么做 x²-3x+1=0怎么做 x²-3x+1=0怎么做 x²-3x+1=0怎么做
答
x²-3x+9/4=5/4
(x-3/2)²=5/4
x=3/2±√5/2