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The Quadratic Formula

Revision as of 19:26, 29 March 2019 by Avgowrish (talk | contribs) (Created page with "The quadratic formula is <math>\frac{-b\pm\sqrt{b^2-4ac}}{2a}.</math> This is used to find the roots of a quadratic, <math>ax^2+bx+c=0.</math> The part inside the square root,...")
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The quadratic formula is $\frac{-b\pm\sqrt{b^2-4ac}}{2a}.$ This is used to find the roots of a quadratic, $ax^2+bx+c=0.$ The part inside the square root, or $b^2-4ac$ is called the discriminant$.$ When the discriminant is equal to $0,$ the quadratic only has one root$,$ which is called a double root. If the discriminant is negative, the quadratic has two non$-$real roots$,$ so the roots are complex$.$ If the discriminant is positive$,$ then the quadratic has two real roots.

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