Adding and Subtracting Rational Expressions Quiz

What is the first step when adding or subtracting rational expressions?

• Find the least common denominator

• Factor the denominators

• Combine the numerators

• Simplify the expressions

In the expression (x + 1) - (x + 2), what is the result?

• x - 1

• 3 - x

• 3 / (x - 1)

• x + 1 - x + 2

What is the least common denominator of 3 and 4?

• 12

• 7

• 10

• 6

What is the least common multiple of x + 2 and x + 4?

• x^2 + 6x + 8

• x^2 + 6x + 8

• x^2 + 6x + 8

• x^2 + 6x + 8

In the expression (3x + 6) / (8x + 4), what is the result after combining like terms?

• 3x + 4

• 3x + 2

• 3x + 8

• 3x + 6

What is the common denominator of x + 2 and x + 1?

• x^2 + 1

• 2x^2 - 1

• x^2 - 1

• 4x

In the expression 5x - 2x^2 - 1 / (x + 2)(x + 1), what is the result after combining like terms?

• 2x^2 + 3x - 1

• 2x^2 - 3x + 1

• -2x^2 - 3x + 1

• -2x^2 + 3x - 1

What is the excluded value for the expression (x^2 + 2x - 1) / (4x)(x^2 - 1)?

• x = 2

• x = 1

• x = -1

• x = 0

What is the excluded value for the expression (2x^2 - 3x + 1) / (4x)(x^2 - 1)?

• x = 2

• x = -1

• x = 1

• x = 0

What is the excluded value for the expression (x^2 + 2x - 1) / (4x)(x^2 - 1)?

• x = 2

• x = 1

• x = -1

• x = 0