Quadratic Function

1. Maximum value

1.1. When a parabola opens downward

2. Zero of a function

2.1. Value of the input x that make the output f(x)= 0

3. Roots of an equation

3.1. Values of the variable that makes an equation true

3.1.1. x^2-1=0 x^2=1

4. Binomaials

4.1. Quadratic expressions with two terms

4.1.1. 3x + 9

5. Trinomials

5.1. Quadratic expressions with three terms

5.1.1. 6x^2 + 3x + 5

6. Completing the Square

6.1. If a quadratic expression of the form x^2 + bx cannot make a model square, you can add a term to form a perfect square trinomials

6.1.1. ax^2 + bx + c = 0 and then solve for x,

7. Complex number

7.1. enumber that can be expressed in the form a + bi,

7.1.1. 2 + 3i

8. Vertex of parabola

8.1. The highest or lowest point

8.1.1. y = a(x – h)2 + k Vertex is (h,K)

9. complex conjugate

9.1. number with an equal real part and an imaginary part equal in magnitude but opposite in sign.

9.1.1. a + bi Is a – bi

10. Parbola

10.1. U-shaped curve

10.1.1. McDonald's sign

11. vertex form

11.1. Highest point

11.1.1. Square

12. Axis of symmetry

12.1. The line through the vertex of parabola

13. Standard form

13.1. Useful form of writing quadratic function

14. minimum value

14.1. When a parabola opens upward

15. Imaginary number

15.1. complex number that can be written as a real number

15.1.1. 5i its square is −25.