3. Quadratic Formula

Video: https://www.youtube.com/watch?v=rE6iv0ka-ig

THAT QUIZ: https://www.thatquiz.org/tq/practicetest?1x2ffeqyams4

Notes: http://www.softschools.com/quizzes/algebra/solving_quadratic_equations/quiz9238.html

REGENTS: http://www.regentsprep.org/regents/math/algtrig/ate3/quadformula.htm

Practice: http://www.regentsprep.org/regents/math/algtrig/ate3/quadpractice.htm

CALCULTOR-Quiz: http://www.mathportal.org/math-tests/quadratic-equation-tests/graph-and-discriminant.php