The document describes a problem where a rectangular piece of cardboard has a length longer than its width. Square pieces are cut from the corners and the sides are folded up to form a box with a volume of 450 cm3. The original length of the cardboard was 16 cm and the width was 11 cm.

1. Imaginary things

2. A rectangular piece of cardboard is 5cm longer than it is wide.
A 3 cm by 3 cm square is cut out of each corner, and the four sides
are folded up to form an open box with a volume of 450 cm3. What
were the length and width of the original piece of cardboard?
Original values are 16 cm and 21 cm

3. Simplify

5. Simplify

6. Simplify

7. Simplify

8. Create an equation with the given roots:

11. Exercise 17
It's all good