8:57
Solving Equations with Logic (1 of 2: Outline of Equation and solving for an unknown)
9:50
Why do we "complete the square"?
9:09
Dividing by zero?
7:57
Completing the square (step by step instruction & visual illustration)
10:19
Completing the Square (1 of 2: Explanation)
2:59
But where does the quadratic formula come from?
29:07
Evgeny Grinko - Jane Maryam - long version
28:09