Salvetor
pacifist85
Hey,
This is a fairly easy problem, but I think the stem is not very clear. That because it says a=2p+9, but it doesn't clarify if this "a" is the area. Especially since before it was stated that the area is A. At least I was left wondering is "a" is the area of the side of the square.
Anyway, I did it both ways. It didn't work out as "a" being the side, so I concluded that it must be the area. And I know that it doesn't make much sense to be the side, since "p", the perimeter, cannot be less than the side. Still though I think it is not clear enough!
I was thinking the same question. He said "a" not "A" .
Yes, the area is given as 'A' and perimeter as 'P' and the relation between them is given as A = 2P + 9
The different As seem to be a typing oversight.
You need to find the perimeter so get rid of A. Side of the square will be \(\sqrt{A}\).
So Perimeter \(P = 4*Side = 4\sqrt{A}\)
\(A = P^2/16 = 2P + 9\)
Solving, we get P = 36