Question

One side of a square is 3x + 2. Which expression represents the perimeter?

Answer 1

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Answer 2

Regardless, we can still answer your question..

The perimeter of a square is 4 * side

we know that the side length is (3x+2)

The perimeter is the sum of all the sides of the object, which is a square in this side.
Since a square has 4 sides and all sides are the same length, we just multiply the side length by 4 to find the perimeter.

What do you get?

Also, remember the distributive property
a(b + c) = ab + ac
a(b - c) = ab - ac