Question

The bases of an isosceles trapezoid are represented by 3x and (3x + 4). The height of the trapezoid is represented by (x + 2). Which polynomial

Answer 1

I can give you what you have so far. I assume you want the area.
Area = (a + b)*h / 2
Area = (3x + 3x + 2) * (x + 2)/2
Area = (6x + 2) (x + 2)
Area = 2*(3x + 1)*(x + 2)/2
Area = (3x + 1)(x + 2) = 3^2 + 7x + 2
Leave a note for me if this is not what you need.