Michael Weiss, Solving and Graphing Quadratics with Symmetry and Transformations, The Mathematics Teacher, Vol. 110, No. 5 (December 2016/January 2017), pp. 394-397 ...

Revise the methods of solving a quadratic equation including factorising and the quadratic formula. See a worked example of how to solve graphically.

Revise the methods of solving a quadratic equation including factorising and the quadratic formula. See a worked example of how to solve graphically.

"You don't necessarily have to understand the words we're saying to see [the graph.] You don't have to know how to solve a quadratic formula to do this activity." ...

The quadratic formula learned by generations of math students is difficult to remember, but it can be used to solve quadratic equations where y = 0.

Quadratic equations are polynomials, meaning strings of math terms. An expression like “x + 4” is a polynomial. They can have ...