Quadratic Functions

1. Vertex of Parabola- the highest/lowest point of a parabola

2. Vertex form - f(x)=a(x-h)² +k where a, h, and k are constants

3. Axis of symmetry - the line through the vertex of a parabola that divides it into 2 congruent halves

4. Minimum value - the y-value of the vertex when the parabola opens upward

5. Zero of a function - the value of the input x that makes the output f(x)=0

6. Binomial - quadratic functions with 2 terms terms, 3x+5

7. Trinomial - quadratic functions with 3 terms, 5x² − 2x − 15

8. Imaginary number - the square root of a negative number written in the for bi, where b is a real number and i in an imaginary unit, √-1

9. Quadratic Function - a function that can be written in the form f(x)=a(x-h)² +k(a≠0), variable is always squared

10. Parabola- U-shaped curve on a graph

11. Standard form - f(x)=ax²+bx+c where a≠0

12. Maximum value - the y-value of the vertex when the parabola opens downward

13. Root of an equation - the values of the variable that make the equation true

14. Imaginary unit - the unit in the imaginary number system √-1

15. Completing the square - process used to form a perfect-square trinomial