1.absolute value of a complex number

1.The absolute value of a + bi is the distance from the origin to the point (a,b) in the complex plane and is denoted | a +bi| = √a2 + b2

2.axis of symmetry

2.A line that divides a plane figure or a graph into two congruent reflected halves.

3.binomial

3.A polynomial with two terms

4.completing the square

4.A process used to form a perfect-square trinomial. To complete the square of x2 + bx, add (b/2)2

5.complex conjugate

5.The complex of any complex number a + bi, denoted a +bi, is a - bi

6.complex number

6.Any number that can be written as a + bi, where a and b are real numbers and i = √-1

7.complex plane

7.A set of coordinate axes in which the horizontal axis is the real axis and the vertical axis is the imaginary axis; used to graph complex numbers.

8.discriminant

8.The discriminant of the quadratic equation ax2 + bx + c = 0 is b2 - 4ac

9.imaginary number

9.The square root of a negative number, written in the form bi, where b is a real number and i is the imaginary unit, √-1. Also called a pure imaginary number.

10.imaginary part

10.For a complex number of the form a + bi, the real number b is called the imaginary part, represented graphically as b units on the imaginary axis of a complex plane.

11.imaginary unit

11.The unit in the imaginary number system, √-1

12.maximum value

12.The y-value of the highest point on the graph of the function

13.minimum value

13.The y-value of the lowest point on the graph of the function

14.parabola

14.The shape of the graph of the graph of a quadratic function. Also, the set of points equidistant from a point F, called the focus, and a line d, called the directrix

15.quadratic function

15.A function that can be written in teh form f(x) = ax2 +bx + c, where a, b, and c are real numbers and a ≠ 0

16.quadratic inequality in two variables

16.An inequality that can be written in one of the following forms:
y<ax2 + bx +c
y>ax2 +bx + c
y≤ax2 +bx + c
y≥ax2 +bx + c
or y ≠ ax2 +bx + c, where a, b, and c are real numbers and a ≠m 0

17.quadratic model

17.A quadratic function used to represent a set of data

18.quadratic regression

18.A statistical method used to fit a quadratic model to a given data set

19.real part

19.For a complex number of the form a +bi, a is the real part

20.root of an equation

20.Any value of the variable that makes the equation true

21.standard form

21.ax2 + bx + c = 0, where a, b, and c are real numbers and a ≠ 0

22.trinomial

22.A polynomial with three terms

23.vertex form

23.A quadratic function written in the form f(x) = a(x-h)2 + k, where a,h, and k are constants and (h,k) is the vertex

24.vertex of a parabola

24.The highest or lowest point on the parabola

25.zero of a function

25.For the function f, any number x such that f(x) = 0