Formulas For Algebra 2

Question 1

Axis of symmetry

Answer 1

x = negative b/2a

Question 2

Discriminant

Answer 2

b^2 - 4ac

Question 3

Sum of roots

Answer 3

r1 + r2 = —b/a

Question 4

Product of roots

Answer 4

r1r2 = c/a

Question 5

Vertex form

Answer 5

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

Question 6

Intercept form

Answer 6

y = a(x-p)(x-q)

Question 7

Standard form

Answer 7

y = ax^2 + bx + c

Question 8

Conic form (vertical graph)

Answer 8

(x - h)^2 = 4p(y - k)

Question 9

conic form (horizontal graph)

Answer 9

(y - k)^2 = 4p(x - h)

Question 10

Equation of parabola (y =)

Answer 10

y = k + 1/4p * (x - h)^2

Question 11

Equation of parabola (x =)

Answer 11

x = h + 1/4p * (y - k)^2