Tiles and Multiplication of Binomials Help

1) Length of a side of a square is 3x-5. Express the area of the square terms in x.
2)Find the area of a rectangle with length x+4 and width x-2.
3)The length of a side of a square is 2x-7. Express the area of the square in terms of x.

1. 9x^2 - 30x + 25
2. x^2 + 2x - 8
3. 4x^2 - 28x + 49

1) (3x-5)^2
2) (x+4)(x-2)
3) similar to 1), so you can do it.