quadratics

vertex form

standard form

factored form

y=a(x-h)^2+k

y=a(x+r)(x+s)

ax^2+bx+c

a, h, k: constants

r, s: roots / where the parabola crosses the x-axis

(h,k): vertex of the parabola

a, r, s: constants

to solve x-intercepts:

x-r = 0

x-s = 0

a, b, c: constants

c: y-intercept / where the parabola crosses the y-axis

axis of symmetry

parabola

U-shaped curve drawn for a quadratic function

a vertical line that divides the parabola into two congruent halves

always passes through the vertex of the parabola

+a: parabola opens up

-a: parabola opens down