Introductory Algebra Glossary

1
Introductory Algebra Glossary

• Chapter Ten

Free powerpoints at http//www.worldofteaching.com
2
quadratic equation

• A quadratic equation is anequation that can be
  written in the form ax2 bx c 0, where a, b,
  and c are real numbers,with a 0.

3
discriminant

• The quantity under the radical in the quadratic
  formula, b2 - 4ac.

4
complex number

• Any number that can be written in the form a
  bi, where a and b are real numbers.

5
imaginary number

• A complex number a bi
• with b ? 0.

6
real part

• The real part of a complex
• number a bi is a.

7
imaginary part

• The imaginary part of the
• complex number a bi is b.

8
standard form of a complex number

• The standard form of a
• complex number is a bi.

9
conjugate of a complex number

• The conjugate of a complex
• number a bi is a - bi.

10
parabola

• The graph of a second-degree (quadratic) equation
  in two variables is called a parabola.

11
parabola

• The graph of a second-degree (quadratic) equation
  in two variables is called a parabola.

12
axis (axis of symmetry)

• The axis of a parabola is thevertical or
  horizontal line through the vertex of the
  parabola.

13
quadratic function

• A function defined by an equation of the form
  f(x) ax2 bx c, for real numbers a, b, and
  c, with a 0.

14
Return to Introductory Algebra

• Created by
• James Q. Jacobs
• Superstition Mountain Campus
• Central Arizona College