1·下列方程(1)-x的平方+2=0 (2)2x的平方-3x=0 (3)-3x的平方=0 (3)x2+ =0(5) =5x (6)2x2-3=(x-3)(x2+1)中是一元二次方程的有( )A、2个 B、3个 C、4个 D、5个2·方程(x-1)2+(
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![1·下列方程(1)-x的平方+2=0 (2)2x的平方-3x=0 (3)-3x的平方=0 (3)x2+ =0(5) =5x (6)2x2-3=(x-3)(x2+1)中是一元二次方程的有( )A、2个 B、3个 C、4个 D、5个2·方程(x-1)2+(](/uploads/image/z/5334933-21-3.jpg?t=1%C2%B7%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8B%EF%BC%881%EF%BC%89%EF%BC%8Dx%E7%9A%84%E5%B9%B3%E6%96%B9%2B2%3D0+%EF%BC%882%EF%BC%892x%E7%9A%84%E5%B9%B3%E6%96%B9%EF%BC%8D3x%3D0+%EF%BC%883%EF%BC%89%EF%BC%8D3x%E7%9A%84%E5%B9%B3%E6%96%B9%3D0+%EF%BC%883%EF%BC%89x2%2B+%3D0%EF%BC%885%EF%BC%89+%EF%BC%9D5x+%EF%BC%886%EF%BC%892x2%EF%BC%8D3%3D%EF%BC%88x%EF%BC%8D3%EF%BC%89%EF%BC%88x2%2B1%EF%BC%89%E4%B8%AD%E6%98%AF%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8B%E7%9A%84%E6%9C%89%EF%BC%88+%EF%BC%89A%E3%80%812%E4%B8%AA+B%E3%80%813%E4%B8%AA+C%E3%80%814%E4%B8%AA+D%E3%80%815%E4%B8%AA2%C2%B7%E6%96%B9%E7%A8%8B%EF%BC%88x%EF%BC%8D1%EF%BC%892%2B%EF%BC%88)
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