解一元二次方程:x²-3x+1=0
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解一元二次方程:x²-3x+1=0
解一元二次方程:x²-3x+1=0
解一元二次方程:x²-3x+1=0
x²-3x+1=0
(x-3/2)^2=9/4-1
x-3/2=±√5/2
x=3/2±√5/2
x²-3x=-1
x²-3x+9/4=-1+9/4
(x-3/2)²=5/4
x-3/2=±√5/2
x=(3-√5)/2,x=(3+√5)/2