SAT Math: Quadratics

What is standard form?

y = ax² + bx + c

What is the Sum of Roots

-b / a

What is the Product of Roots

c / a

What is the Quadratic Formula?

What is Vertex Form?

y = a(x - h)² + k

D > 0 (the discriminant is greater than zero)

Two solutions

D = 0 (the discriminant is equal to zero)

One solution

D < 0 (the discriminant is lesser than zero)

No real solutions

When is the graph concave up?

When a > 0

When is the graph concave down?

When a < 0