Quadratic formulas

Quadratic formula

y = -b \pm \sqrt{b^2 - 4ac / 2a

Use this to find when something hits a certain value (e.g. height = 100 m)

Standard form

y = ax² + bx + c

vertex form

y = a (x-h)²

axis of symmetry

x = -b/2a

Gives the x-value of the vertex if you're in standard form

Helps find the turning point quickly

discriminant

b² - 4ac