# 6.2 – Simplified Form for Radicals

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6.2 – Simplified Form for Radicals
Product Rule for Square Roots Examples:

6.2 – Simplified Form for Radicals
Quotient Rule for Square Roots Examples:

6.2 – Simplified Form for Radicals

6.2 – Simplified Form for Radicals
Rationalizing the Denominator Radical expressions, at times, are easier to work with if the denominator does not contain a radical. The process to clear the denominator of all radicals is referred to as rationalizing the denominator

6.2 – Simplified Form for Radicals
Examples:

6.2 – Simplified Form for Radicals
Examples:

6.2 – Simplified Form for Radicals
Theorem: If “a” is a real number, then 𝑎 2 = 𝑎 . Examples: 40 𝑥 2 𝑥 2 −16𝑥+64 18𝑥 3 −9 𝑥 2 4∙10 𝑥 2 𝑥−8 2 9𝑥 2 2𝑥−1 2 𝑥 10 𝑥−8 3 𝑥 2𝑥−1

Review and Examples:

Examples:

Examples:

6.4 –Multiplication and Division of Radical Expressions
Examples:

6.4 –Multiplication and Division of Radical Expressions
Examples: 𝑥− 3𝑥 + 5𝑥 − 15

6.4 –Multiplication and Division of Radical Expressions
Review: (x + 3)(x – 3) x2 – 3x + 3x – 9 x2 – 9 𝑥 𝑥 −3 𝑥 2 −3 𝑥 +3 𝑥 −9 𝑥−9

6.4 –Multiplication and Division of Radical Expressions
Examples:

6.4 –Multiplication and Division of Radical Expressions
If the denominator contains a radical and it is not a monomial term, then the use of a conjugate is required in order to rationalize the denominator. conjugate

6.4 –Multiplication and Division of Radical Expressions
Example:

6.4 –Multiplication and Division of Radical Expressions
Example:

Radical Equations: The Squaring Property of Equality: Examples:

Suggested Guidelines: 1) Isolate the radical to one side of the equation. 2) Square both sides of the equation. 3) Simplify both sides of the equation. 4) Solve for the variable. 5) Check all solutions in the original equation.

no solution

6.6 – Complex Numbers Complex Number System:
This system of numbers consists of the set of real numbers and the set of imaginary numbers. Imaginary Unit: The imaginary unit is called i, where and Square roots of a negative number can be written in terms of i.

Operations with Imaginary Numbers
6.6 – Complex Numbers The imaginary unit is called i, where and Operations with Imaginary Numbers

6.6 – Complex Numbers The imaginary unit is called i, where and
Numbers that can written in the form a + bi, where a and b are real numbers. 3 + 5i 8 – 9i –13 + i The Sum or Difference of Complex Numbers

6.6 – Complex Numbers

Multiplying Complex Numbers

Multiplying Complex Numbers

Dividing Complex Numbers
Rationalizing the Denominator:

Dividing Complex Numbers
Complex Conjugates: The complex numbers (a + bi) and (a – bi) are complex conjugates of each other and, (a + bi)(a – bi) = a2 + b2

Dividing Complex Numbers
Complex Conjugates: The complex numbers (a + bi) and (a – bi) are complex conjugates of each other and, (a + bi)(a – bi) = a2 + b2

Dividing Complex Numbers
Complex Conjugates: The complex numbers (a + bi) and (a – bi) are complex conjugates of each other and, (a + bi)(a – bi) = a2 + b2