Combining Like Terms

Defn In an expression , terms are separated by signs . (Provide examples)
Like terms are terms that have identical variable parts and exponents. (Provide examples)

Ex 1 Combine like terms .

Ex 2 Simplify . Use the distributive property; then combine like terms.

Ex 3 A triangle has sides of length feet, feet, and feet. Each side is doubled in
length. What is the perimeter of the new enlarged triangle?