Khan Academy

Vertex form introduction (K-A)

Completing the square-video (K-A)

Quadratic equations word problem: box dimensions (K-A)

Quadratic equations word problem: triangle dimensions (K-A)

Solving quadratics by completing the square (K-A)

Solving quadratics by factoring review (K-A)

Solving quadratics by factoring-link (K-A)

Solving quadratics by factoring-video (K-A)

Solving quadratics by factoring: leading coefficient ≠ 1 (K-A)

Solving quadratics using structure (K-A)

Completing the square review (K-A)

Solving quadratics by completing the square: no solution (K-A)

Worked example: Completing the square (intro) (K-A)

Worked example: completing the square (leading coefficient ≠ 1) (K-A)

Worked example: Rewriting expressions by completing the square (K-A)

Worked example: Solving equations by completing the square (K-A)

Finding the vertex of a parabola in standard form (K-A)

Discriminant review (K-A)

Graphing quadratics: standard form (K-A)

Proof of the quadratic formula (K-A)

Quadratic formula proof review (K-A)

Quadratic word problem: ball (K-A)

Quadratic formula review (K-A)

The quadratic formula-video (K-A)

Understanding the quadratic formula (K-A)