Finding the Least Common Denominator

• x + 3

• (3-x)(x-3)

• 3 - x

• x - 3

Find the LCD of the following rational expressions

• (x+1)(x-1)

• (x+1)² (x-1)

• (2x+2)

• (x+1)(x-1)

• (x+1)² (x-1)

• (2x+2)

• (x+1)(x²-1)

• (x+1)(x-1)

• (x+1)² (x-1)

• (2x+2)

My answer is incorrect! :-O Look over my work. Where did I go wrong?

• Step 1 - incorrect factoring

• Step 2 - incorrect factoring

• Step 3 - incorrect factor for the least common multiple

• Step 4 - incorrect distributing

• Step 5 - incorrect combination of like terms

You need a Common Denominator to

• add rational expressions

• subtract rational expressions

• multiply rational expressions

• divide rational expressions