Brian McLogan
How to find the roots of an quadratic equation - Free Math Help
👉 Learn how to solve a quadratic equation by applying the quadratic formula. To apply the quadratic formula the quadratic equation must be equal to zero. Then you can apply the quadratic formula to determine solutions to the equation,...
Khan Academy
Khan Academy: Algebra: Quadratic Functions 3
Video graphing a parabola by plotting the roots, vertex and axis of symmetry. Roots of the quadratic function are found by factoring. Vertex of the parabola is found by three different methods: taking the midpoint of the roots, finding...
Khan Academy
Khan Academy: Solving and Graphing Quadratics: Roots and Vertex of a Parabola
Video graphing a parabola by plotting the roots, vertex and axis of symmetry.