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Pre-Calculus Sec 1.4 Rational ExpressionsPowerPoint Presentation

Pre-Calculus Sec 1.4 Rational Expressions

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### Pre-CalculusSec 1.4 Rational Expressions

### Hw #4 p41 1,4,5,7,10,11,1522,25,27,34,39,42,45,49,51

Objectives:

To review domain

To simplify rational expressions

Vocabulary

A quotient of two algebraic expressions is a fractional expression.

A rational expression is a fractional expression where both the numerator and denominator are polynomials.

Domain

The domain of an algebraic expression is the set of real numbers that the variable is permitted to have.

Some basic expressions and their domains.

Multiplying Rational Expressions

To multiply rational expressions, we use this property of fractions:

Dividing Rational Expressions

To divide rational expressions, we use this property of fractions:

Adding & Subtracting Rational Expressions

To add or subtract rational expressions, we first find a common denominator and then use this property of fractions:

Compound Fractions

A compound fraction is a fraction in which the numerator, the denominator, or both, are themselves fractional expressions.

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