2 4 Conditions for the types of roots of quadratic equations

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Published on January 26, 2015 8:36:12 AM ● Video Link: https://www.youtube.com/watch?v=0WuLBWPx_10

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在这个影片里面会跟大家讲解Conditions for the types of roots of quadratic equations。

b^2 - 4ac greater than 0, two real and distinct roots , two intersection points
b^2 - 4ac equal to 0, two real and equal roots, one intersection points, tangent for curve.
b^2 - 4ac less than 0, no real roots, no intersection points, not intersect.
b^2 - 4ac greater than and equal to 0 has real roots , 这个比较少见。