This video explains how to rationalize the denominator of a radical expression by multiply by the conjugate that contains variables.

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# Rationalize the Denominator – Conjugate with Variables

# Cube a Complex Number

# Multiply Three Complex Numbers

# Multiply Two Radicals with Variables (Index 4 and 5) Perfect Roots

# Solve a Proportion using 2 Methods (2x)/(x+9)=4/7

# Introduction to Solving Proportions

# Divide Rational Expressions: (quad/linear)/(quad/quad) a Not 1

This video explains how to rationalize the denominator of a radical expression by multiply by the conjugate that contains variables.

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This video explains how to cube a complex number.

This video explains how to multiply three complex numbers.

This video explains how to multiply and simplify two radicals. One example has an index of 4 and another examples has an index of 5.

This video solves a proportion in two ways.

This video introduces to methods for solving proportions.

This video explains how to divide and simplify rational expressions.