Students learn to solve quadratic equations — finding the x-values where a parabola crosses zero — by factoring when possible and by the quadratic formula when it isn’t, the workhorse method that solves every quadratic.
Students will be able to…
A parabola’s roots are where it crosses the x-axis — the solutions to ax² + bx + c = 0. How do you find them, even when the equation won’t factor neatly?
Project each item and have students solve. The tool shows factoring and the quadratic formula — the method that always works.
Tap any phase to open the teacher moves and student actions.
A parabola’s roots are where y = 0 — how do we find them?
Teacher models.
Class uses Solve the Quadratic.
Students solve quadratics.
One quadratic.
Aligned to the Common Core State Standards for Mathematics (High School: Algebra II).
Solve quadratic equations in one variable.
Solve quadratics by inspection, factoring, completing the square, and the quadratic formula.
Factor a quadratic to reveal the zeros of the function.
Solve quadratic equations with complex solutions.
Preview the three formative checks. Tap “Sample answer” to see what mastery looks like — hide them before you print for students.
Have students use the discriminant (b² − 4ac) to predict whether a quadratic has two real, one real, or two complex solutions — before solving. A printable quadratics sheet is in the Math library.
Tap a card to flip it, then rate whether you knew it. Built from this lesson’s vocabulary.
A quick self-check with instant feedback, drawn from this lesson’s key terms.
A print-and-go review sheet with a built-in answer key. Tap “Show answer key” to reveal answers, or print the clean version for students.