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b2 4ac rules. If b2 - 4ac is less. You cant take the square root of a negative number so this means there are no real roots and the quadratic doesnt cross the x axis.
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What does this formula tell us. Displaystyle b 2- 4 a c b2 4ac can tell us how many roots well get. F o r m u l a Discriminant b 2 4 a c.
The discriminant is b2 - 4ac which comes from the quadratic formula and we can use this to find the nature of the roots.
B 2 4 a c. Quadratic Formula Proven Consider equation in a standard form. Previous section Problems Next page The Quadratic Formula page 2. The discriminant is b2 - 4ac which comes from the quadratic formula and we can use this to find the nature of the roots.
