youtube.com › watchSolving Quadratics by Using the Quadratic Formula
You remember this one, don't you? Opposite of b, plus or minus... what was it? Well instead of just telling you, why don't we derive the formula? As it turns out, it's like completing the square, but with variables. Will you just watch this already? I can't explain it without the pictures. Watch the whole Mathematics playlist: http://bit.ly ...