Diagrams like the one in problem 3-87 are referred to as area models. Area models represent multiplication of algebraic expressions. For each multiplication expression, sketch an area model Label the dimensions and the area of each part. Then write an equation showing that the area as a product equals the area as a sum. a (x + 1)(x + 2) b. 3(2x + 5) c. (2x - 3)(x + 2) d. (x - 1)(y-1) e. --2y(y + 3) f.(-2+1)(3x + y - 4)