Quadratic equations
Solving quadratics by factoring
Solving quadratics using structure
Worked example: rewriting & solving equations by completing the square
Worked example: completing the square
The quadratic formula
Worked example: quadratic formula (negative coefficients)
Proof of the quadratic formula
Using the quadratic formula: number of solutions
Discriminant for types of solutions for a quadratic
Quadratic equations word problem: triangle dimensions
Quadratic equations word problem: box dimensions
Quadratic word problem: ball
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You can master basic concepts, explore subjects further or reinforce your knowledge − at your own pace.
Wherever you are in your learning journey, here are links to free materials that may be useful to identify both your strengths and any knowledge gaps in key background subjects.