Rational Denominator

Simplify 

• (x+7)/(x-4)

• -3/4

• (x+3)/(x+4)

• (x+3)/(x-4)

Simplify

• (x-9)/(x+9)

• 1/(x-9)

• (x+9)

• 1/(x+9)

Divide and Simplify

• A

• B

• C

• D

When adding and subtracting rational expressions, my first step should be to:

• Combine like terms in the numerators.

• Determine a Least Common Denominator.

• Factor all of the numerators and all of the denominators.

• Change the operator to multiplication and reciprocate the second fraction.

To simplify a rational expression, I should

• Eliminate common terms in the numerator and denominator.

• Combine like terms in the numerator and denominator.

• Factor the numerator and denominator and eliminate common factors.

• Find an LCD.

Perform the operation

• A

• B

• C

• D

Perform the operation

• A

• B

• C

• D

Find the LCD of the following rational numbers

5/4 and 2/3

• 12

• 5

• 24

• 7

Find the LCD of the following rational numbers

2/5 and 3/10

• 10

• 5

• 15

• 20