Algebra Formulas
Quadratic Equation
Here are a few links to good, free tutorials about quadratic equations:
http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut20_quadform.htm
http://tutorial.math.lamar.edu/AllBrowsers/1314/SolveQuadraticEqnsI.asp
Midpoints Equation
Distance formula
Links to great, no crap tutorials include
