Understanding Adding and Subtracting Rational Expressions

What is the first step in subtracting rational expressions?

• Simplify the numerators

• Combine the numerators

• Factor the denominators

• Find the least common multiple

What factors are needed to get a sum of 5 and a product of 4?

• 5 and 0

• 3 and 2

• 4 and 1

• 2 and 2

What is a difference of perfect squares?

• x^2 - 1

• x^2 + 1

• x^2 + 2x + 1

• 2x^2 - 1

How do you find a common denominator for rational expressions?

• Add denominators together

• Use the highest exponent of variables

• Multiply denominators directly

• Include missing factors from each expression

What do you multiply the first fraction by to achieve a common denominator?

• x^2 - 1

• x + 1

• x - 1

• x + 4

What is the result of simplifying 2(x - 1) - 3(x + 4)?

• x - 14

• -x - 14

• -x + 14

• x + 14

What operation is performed in the numerator to simplify the expression?

• Subtraction

• Addition

• Division

• Multiplication

What is the result of multiplying (x + 1) and (x - 1)?

• x^2 + 1

• x^2 - 1

• x^2 + 2x - 1

• x^2 - 2x + 1

What is the simplified form of the denominator after combining the rational expressions?

• x^3 - 4x^2 - x + 4

• x^3 + 4x^2 - x - 4

• x^3 + 4x^2 + x - 4

• x^3 - 4x^2 + x + 4

How is the final denominator ordered?

• In ascending order of powers

• Alphabetically

• In descending order of powers

• Randomly