posted by kibodee .
Shift all values to the left side of the equation. Then factor.
1. x^2 - 5x + 6 = 0
Think of two factors of each of the end terms that will add to the center value (6,1 or 3,2?).
(x-3)(x-2) = 0
x = 3 or 2
Use a similar process for the remaining two problems.