Module E_ Rational Expressions - Find LCD & Add & Subtract

Review of Module E2: 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.

• b + 6

• b - 7

Review of Mod E2: When _______ rational expressions, my first step will be to change the operator to multiplication and reciprocate the second fraction.

• Adding

• Subtracting

• Multiplying

• Dividing

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.

• 12

• 5

• 24

• 7

• (x+8)(x-3)

• 8x(x+2)

• (x²+3x+24

What movie are these puppies from?

• Lady and The Tramp

• Bambi

• Jungle Book

• 101 Dalmations

Name this guy.

• Waggy

• Shaggy

• Yaggy

• Baggy

What is the least common multiple of 3x² - 27 and 5x²+10x-75?

HINT: Think least common denominator!

• 3(x+3)(x-3)(x+5)

• 15(x+3)(x+3)(x+5)

• 15(x+3)(x-3)(x+5)

• 5(x+3)(x-3)(x+5)