Common Core maths standard · High School Algebra

HSA-REI.B.4

Solve quadratics by factoring and reading zeros from graphs; use the discriminant to count real solutions. One game practises it.

High School · Algebra

Structure in expressions · Polynomials · Equations & inequalities

1 think & learn

Think & learn HSA-REI.B.4 · HSA-SSE.B.3a

Where does the parabola hit the x-axis? Factor, read the graph, and let the discriminant decide.