Adding Rational Expressions Unlike LCD

Add the rational function: 
1/x+1/x

• 2/x
• 4x
• 2x
• 1x

What is the least common multiple of  x²-16 and x²+4x-32?
HINT: Think least common denominator!

• (x + 4)(x – 4)(x + 8)
• (x-4)2 (x+8)
• (x + 4)(x – 4)
• (x - 4)(x-4)2(x + 8)

12          +          3
____              ____
x²+5x-24          x - 3        

• 3 (x +12)
  ______ 
  (x+8) (x -3)
• 3x
  _______
  (x+8)(x-3)
• 3x-2
  _______
  (x-8)(x+3)
• None of these

Find the least common denominator of the expression

• 18
• 6x
• 3xy
• 6xy

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

• A

• B

• C

• D

Add. 
*Note that denominators are the same already!

• A
• B
• C
• D

• A.
• B.
• C.
• D.