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Imaginary things
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
Simplify
Simplify
Simplify
Simplify
Create an equation with the given roots:
Exercise 17


It's all good

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