# adding and subtracting complex numbers   97 videos

• #### Adding and Subtracting Complex Numbers

How to add and subtract complex numbers.

• #### The Complex Plane

##### PrecalculusPolar Coordinates and Complex Numbers

How to plot complex numbers on the complex plane.

real numbers the number line complex numbers imaginary numbers the complex plane

##### Pre-AlgebraWhole Numbers

Using the number line to represent adding and subtracting whole numbers

• #### Multiplying Complex Numbers

##### PrecalculusPolar Coordinates and Complex Numbers

How to multiply two complex numbers in trigonometric form.

complex numbers trigonometric form modulus argument
• #### Dividing Complex Numbers

##### PrecalculusPolar Coordinates and Complex Numbers

How to divide two complex numbers in trigonometric form.

complex numbers trigonometric form modulus argument conjugate
• #### Adding and Subtracting Rational Expressions

##### Algebra 2Rational Expressions and Functions

How to add and subtract rational expressions.

rational expressions adding subtracting lcd least common denominator factoring
• #### Multiplying Complex Numbers

How to multiply imaginary numbers.

complex numbers multiplying i
• #### Finding the Roots of a Complex Number

##### PrecalculusPolar Coordinates and Complex Numbers

How to use DeMoivre's Theorem to compute the cube roots of a complex number.

complex numbers trigonometric form complex roots cube roots modulus argument
• #### More Roots of Complex Numbers

##### PrecalculusPolar Coordinates and Complex Numbers

How to find the roots of a complex number quickly using four simple guidelines.

complex numbers trigonometric form complex roots modulus argument
• #### Trigonometric Form of Complex Numbers

##### PrecalculusPolar Coordinates and Complex Numbers

How to express a complex number in trigonometric form.

complex numbers the complex plane modulus argument sine cosine tangent rectangular form trigonometric form
• #### Dividing Complex Numbers

How to rationalize the denominator when dealing with an imaginary number.

dividing by i complex numbers
• #### Adding and Subtracting Polynomials

##### Pre-AlgebraPolynomials

Adding and subtracting polynomials with pictures or aligning vertically

• #### Converting Complex Numbers From Rectangular Form to Trigonometric

##### PrecalculusPolar Coordinates and Complex Numbers

How to convert a complex number from rectangular form to trigonometric form.

complex numbers rectangular form trigonometric form modulus argument
• #### Addition and Subtraction with Mixed Numbers

##### Pre-AlgebraFractions and MIxed Numbers

Adding or subtracting mixed numbers by either converting them to improper fractions or working with the integer part and the fractional part separately

• #### Adding and Subtracting Polynomials

##### AlgebraPolynomials

How to add or subtract polynomials.

simplify combine like terms
• #### Adding/Subtracting Fractions- Like Denominators

##### Pre-AlgebraFractions and MIxed Numbers

Adding and subtracting fractions that have the same denominator, including a visual representation

• #### Adding/Subtracting Fractions- Unlike Denominators

##### Pre-AlgebraFractions and MIxed Numbers

Drawing pictures and procedures for adding or subtracting fractions with unlike denominators

• #### Adding and Subtracting Rational Expression

##### AlgebraRational Expressions and Functions

How to add or subtract rational expressions.

common denominator excluded value
• #### Simplifying Complex Fractions

##### Algebra 2Rational Expressions and Functions

How to simplify a complex fraction.

complex fractions dividing by a fraction flip and multiply