Lesson: Discriminants of Quadratics Mathematics • First Year of Secondary School

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In this lesson, we will learn how to find the discriminant of a quadratic equation and use it to determine the number and type of its roots (solution) without solving it.

Lesson Plan

Students will be able to

recall the equation for the discriminant of a quadratic equation,
use the discriminant to identify the number of real roots a quadratic equation has,
use the discriminant to determine whether a quadratic equation has rational roots,
use the discriminant to evaluate unknowns that satisfy certain conditions related to the types of roots.