解一元二次方程 X2=4X-4 5X2+2X=3X2+5 2X(X-2)=-3
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![解一元二次方程 X2=4X-4 5X2+2X=3X2+5 2X(X-2)=-3](/uploads/image/z/5177024-8-4.jpg?t=%E8%A7%A3%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8B+X2%3D4X-4+5X2%2B2X%3D3X2%2B5+2X%28X-2%29%3D-3)
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解一元二次方程 X2=4X-4 5X2+2X=3X2+5 2X(X-2)=-3
解一元二次方程 X2=4X-4 5X2+2X=3X2+5 2X(X-2)=-3
解一元二次方程 X2=4X-4 5X2+2X=3X2+5 2X(X-2)=-3
X2=4X-4
x^2-4x+4=0
(x-2)^2=0
x=2
5X2+2X=3X2+5
2x^2+2x-5=0
2(x+1/2)^2=11/2
x+1/2=±√11/4
x=(-1±√11)/2
2X(X-2)=-3
2x^2-4x+3=0
2(x^2-2x+1)+1=0
2(x-1)^2+1=0
无解
X2=4X-4
x²-4x+4=0
(x-2)²=0
x1=x2=2
5X2+2X=3X2+5
2x²+2x-5=0
x=(-2±2根号11)/4
x=(-1±根号11)/2
2X(X-2)=-3
2x²-4x+3=0
因为△=16-24=-8<0
所以,该方程无解。
3(x-2)+1=x-(2x-1)