试问:二次函数y=(m²+1 )x²-2mx+m²+4的图像与x轴交点情况如何?
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![试问:二次函数y=(m²+1 )x²-2mx+m²+4的图像与x轴交点情况如何?](/uploads/image/z/3950463-39-3.jpg?t=%E8%AF%95%E9%97%AE%EF%BC%9A%E4%BA%8C%E6%AC%A1%E5%87%BD%E6%95%B0y%3D%EF%BC%88m%26%23178%3B%2B1+%EF%BC%89x%26%23178%3B-2mx%2Bm%26%23178%3B%2B4%E7%9A%84%E5%9B%BE%E5%83%8F%E4%B8%8Ex%E8%BD%B4%E4%BA%A4%E7%82%B9%E6%83%85%E5%86%B5%E5%A6%82%E4%BD%95%3F)
试问:二次函数y=(m²+1 )x²-2mx+m²+4的图像与x轴交点情况如何?
试问:二次函数y=(m²+1 )x²-2mx+m²+4的图像与x轴交点情况如何?
试问:二次函数y=(m²+1 )x²-2mx+m²+4的图像与x轴交点情况如何?
ΔΔ=4m²-4(m²+1 )(m²+4)=-4×(-m²)-4(m^4+5m²+4)=
=-4(m^4+5m²+4-m²)
=-4(m²+2)²