Quiz on Adding and Subtracting Rational Expressions

What is the first step in adding two fractions?

• Multiply the numerators

• Divide the fractions

• Find a common denominator

• Subtract the denominators

When factoring polynomials, what is the least common factor for x^2 - 1?

• x^2

• 2

• x + 1

• x - 1

How do you determine the least common multiple of monomials?

• By dividing the largest term by the smallest

• By selecting the highest power of each factor

• By multiplying the smallest powers

• By adding all the terms

What is the least common multiple of 15a^2bc^3, 16b^5c^2, and 20a^3c^6?

• 960a^3b^5c^6

• 480a^3b^4c^5

• 640a^2b^5c^6

• 320a^2b^5c^3

In the example of factoring x^3 - x^2 - 2x, what is the first step?

• Divide by x

• Factor out the common multiple

• Multiply by a constant

• Add all terms

What is the common denominator for 5a^2/6b + 9/14a^2b^2?

• 42a^2b

• 28a^2b^2

• 84a^2b^2

• 56a^2b

When simplifying 2x + 20 - 3x - 15, what is the result?

• x + 5

• x - 5

• -x - 5

• -x + 5

What happens when you factor out a negative from -x + 5?

• It becomes x - 5

• It becomes -x + 5

• It becomes -x - 5

• It becomes x + 5

In the final example, what is the missing factor in the right denominator?

• x + 1

• x - 2

• x - 1

• x + 2

What is the final expression after simplifying 6x + 5x - 10?

• 11x - 4

• 11x + 4

• 10x - 4

• 10x + 4