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17 terms

Chapter 5 Vocabulary

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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
discriminant
b²-4ac