# Simplifying Rational Expressions 3 Video

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# Simplifying Rational Expressions 3 Video Tutorial

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# Simplifying Rational Expressions 3

This math video tutorial gives a step by step explanation to a math problem on "Simplifying Rational Expressions 3".

# Expressions

An expression is a combination of numbers, operators, grouping symbols (such as brackets and parentheses) and/or free variables and bound variables arranged in a meaningful way which can be evaluated. Bound variables are assigned values within the expression (they are for internal use) while free variables can take on values from outside the expression.

# Rational Numbers

A rational number is a number which can be expressed as a ratio of two integers. Non-integer rational numbers (commonly called fractions) are usually written as the vulgar fraction a / b , where b is not zero. a is called the numerator, and b the denominator.

How many legs in total do two chickens, a duck, and two sheep have?