用适当的方法解:3x^2=54 x^2-4x=8 6x^2-4=3x x^2-√6x+1=0 3x^2=54 x^2-4x=8 6x^2-4=3x x^2-√6x+1=0
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![用适当的方法解:3x^2=54 x^2-4x=8 6x^2-4=3x x^2-√6x+1=0 3x^2=54 x^2-4x=8 6x^2-4=3x x^2-√6x+1=0](/uploads/image/z/3776322-66-2.jpg?t=%E7%94%A8%E9%80%82%E5%BD%93%E7%9A%84%E6%96%B9%E6%B3%95%E8%A7%A3%EF%BC%9A3x%5E2%3D54+x%5E2-4x%3D8+6x%5E2-4%3D3x+x%5E2-%E2%88%9A6x%2B1%3D0+3x%5E2%3D54+x%5E2-4x%3D8+6x%5E2-4%3D3x+x%5E2-%E2%88%9A6x%2B1%3D0)
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用适当的方法解:3x^2=54 x^2-4x=8 6x^2-4=3x x^2-√6x+1=0 3x^2=54 x^2-4x=8 6x^2-4=3x x^2-√6x+1=0
用适当的方法解:3x^2=54 x^2-4x=8 6x^2-4=3x x^2-√6x+1=0
3x^2=54 x^2-4x=8 6x^2-4=3x x^2-√6x+1=0
用适当的方法解:3x^2=54 x^2-4x=8 6x^2-4=3x x^2-√6x+1=0 3x^2=54 x^2-4x=8 6x^2-4=3x x^2-√6x+1=0
1)3x²=54
x²=18
x=±3√2
x1=3√2,x2=-3√2
2)x²-4x=8
x²-4x+4=12
(x-2)²=12
x-2=±2√3
x1=2+2√3,x2=2-2√3
3)6x²-4=3x
6x²-3x-4=0
x=[3±√(9+96)]/12=(3±√105)/12
x1=(3+√105)/12,x2=(3-√105)/12
4)x²-√6x+1=0
x=[√6±√(6-4)]/2
x1=(√6+√2)/2,x2=(√6-√2)/2