ax的平方+bx+c=0(a不等于0)两个实数根异号的条件是?以方程2x^2-4x-1=0的两个根的平方为根的一元二次方程是A,4x^2-12x+1=0 b,x^2-20x+4=0 c,4x^2-20x+1=0 d,x^2-5x+1=0关于X的方程x^2-(k+1)x+k+2=0的两根的平方和
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![ax的平方+bx+c=0(a不等于0)两个实数根异号的条件是?以方程2x^2-4x-1=0的两个根的平方为根的一元二次方程是A,4x^2-12x+1=0 b,x^2-20x+4=0 c,4x^2-20x+1=0 d,x^2-5x+1=0关于X的方程x^2-(k+1)x+k+2=0的两根的平方和](/uploads/image/z/6924160-64-0.jpg?t=ax%E7%9A%84%E5%B9%B3%E6%96%B9%2Bbx%2Bc%3D0%28a%E4%B8%8D%E7%AD%89%E4%BA%8E0%EF%BC%89%E4%B8%A4%E4%B8%AA%E5%AE%9E%E6%95%B0%E6%A0%B9%E5%BC%82%E5%8F%B7%E7%9A%84%E6%9D%A1%E4%BB%B6%E6%98%AF%3F%E4%BB%A5%E6%96%B9%E7%A8%8B2x%5E2-4x-1%3D0%E7%9A%84%E4%B8%A4%E4%B8%AA%E6%A0%B9%E7%9A%84%E5%B9%B3%E6%96%B9%E4%B8%BA%E6%A0%B9%E7%9A%84%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8B%E6%98%AFA%2C4x%5E2-12x%2B1%3D0++b%2Cx%5E2-20x%2B4%3D0++c%2C4x%5E2-20x%2B1%3D0+d%2Cx%5E2-5x%2B1%3D0%E5%85%B3%E4%BA%8EX%E7%9A%84%E6%96%B9%E7%A8%8Bx%5E2-%28k%2B1%29x%2Bk%2B2%3D0%E7%9A%84%E4%B8%A4%E6%A0%B9%E7%9A%84%E5%B9%B3%E6%96%B9%E5%92%8C)
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