X b b2 4ac 2a. Back them up with references or personal experience. All quadratic equations can be written in the form ax2 bx c 0 where a b and.
Solve 2x 2 - 8x 0.
X 6 62 451 25. Solve x 2 - 4x 4 0. X b b2 4ac 2a. Otherwise we will need other methods such as completing the square or using the quadratic formula.