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formula delta b2 4ac. Heres how the discriminant works. D b² - 4ac.
Quadratic Formula Proof Review Article Khan Academy from www.khanacademy.org
Example 1 Solve 2x2- 7x - 5 0 using the quadratic formula. Exemple calculons le discriminant D de lequation x² 2x - 3 0. The discriminant is the expression b2 - 4 ac which is defined for any quadratic equation ax2 bx c 0.
D 4.
In addition notice the symbol. The expression b2 4ac is called the discriminant and in some books you will see it written with a Greek upper case Delta like this Delta b2 4ac. The quadratic formula mainly involves plugging numbers into the equation but there are a few things you need to know. If we have a quadratic equation of the form ax²bxc 0.
