Since the perimeter is the sum of the length of all sides we multiply width and length by 2 and then add them together
A box shaped like a cube has an edge that is 28 cm long. How much space is available to pack inside the box?
2 answers:
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Let be the two numbers. We have two pieces of information:
(the difference between the two numbers is 2)
(their product is 224)
From the first equation, we can deduce
If we plug this expression in the second equation, we have
If you solve this equation with the usual quadratic formula you get the solutions
So, you have the following couple of solutions, recalling that x is 2 more than y: