# Sign up for an account

Already have a Quizlet account?

Log in.

###
Quadratic Function

a function that can be written in the form f(x)=ax^2+bx+c, where a, b & c are real numbers and a is not equal to zero

###
Parabola

the graph of a quadratic function

###
Axis of Symmetry

a line that divides a a parabola into two parts that are mirror images

###
Vertex of a Parabola

the point at which the parabola intersects the axis of symmetry

###
Vertex Formation of a Quadratic Function

y=a(x-h)^2+k; the coordinates of the vertex of the parabola are (h,k)

###
Factoring

rewriting an expression as the product of its factors

###
GCF (greatest common factor) of an expression

the common factor with the greatest coefficient and the greatest exponent

###
perfect square trinomial

the product you obtain when you square a binomial

###
Difference of two squares

a^2-b^2

###
standard form of a quadratic equation

ax^2 + bx + c = 0; where a is not 0

###
imaginary number

any number of the form a+bi, where a and b are real numbers, and b is not 0

###
i

defined as the number whose square is -1

###
complex numbers

real and imaginary numbers

###
complex number plane

represents a complex number geometrically

###
absolute value of a complex number

its distance from the origin on the complex number plane.

###
completing the squares

the process of finding the last term of a perfect square trinomial by rewriting the constant term

### Please allow access to your computer’s microphone to use Voice Recording.

## We can’t access your microphone!

### Click the icon above to update your browser permissions and try again

Example:

### Reload the page to try again!

Reload

## Press Cmd-0 to reset your zoom

## Press Ctrl-0 to reset your zoom

### It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

## Your microphone is muted

### For help fixing this issue, see this FAQ.