Quadratics
2.1 Deriving the Quadratic Formula. (We’ve been doing it all along!)
Lesson materials located below the video overview.
SETTING THE SCENE
You may already know that there is famous formula one can use to solve all quadratic equations. Most curricula want students to know this formula, memorise it, and use the formula with speed. Personally, as a mathematician, and I don’t feel the need to do anything with speed! Plus, I find memorisation joyless and unnecessary. So what if I take an extra twenty seconds to draw a square on the side of my page to solve a quadratic equation?
But here’s the secret: We have actually been doing the quadratic formula all along! Our square method, the quadrus method, is the quadratic formula in disguise.
The goal of this essay is to explain this.
READ MORE HERE: QUADRATICS PD Essay 2.1
(See too Edfinity.com/XXX for a robust source of curriculum practice problems for you collate, organise, and use.)
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