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Algebra Definitions
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Introductory Algebra Glossary

Introductory Algebra Glossary

Chapter Ten

Slide 2

Quadratic equation

Quadratic equation

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

Slide 3

Discriminant

Discriminant

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

Slide 4

Complex number

Complex number

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

Slide 5

Imaginary number

Imaginary number

A complex number a + bi

with b  0.

Slide 6

Real part

Real part

The real part of a complex

number a + bi is a.

Slide 7

Imaginary part

Imaginary part

The imaginary part of the

complex number a + bi is b.

Slide 8

Standard form of a complex number

Standard form of a complex number

The standard form of a

complex number is a + bi.

Slide 9

Conjugate of a complex number

Conjugate of a complex number

The conjugate of a complex

number a + bi is a - bi.

Slide 10

Parabola

Parabola

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

Slide 11

parabola

parabola

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

Slide 12

Axis (axis of symmetry)

Axis (axis of symmetry)

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

Slide 13

Quadratic function

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.

Slide 14

Return to Introductory Algebra

Return to Introductory Algebra

Created by

James Q. Jacobs

Superstition Mountain Campus

Central Arizona College

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