Neither ordered pair is a solution. If you solve y^2-6y + 14 = 0 you'll see by the discriminate b^2-4ac that it is not a perfect square, i.e = -20, so the solutions are imaginary numbers, i.e. no real solutions.
The answer is 24 guppies. First find the volume of the tank, then divide that volume by 576 (you should get 8), then you multiply 3 guppies by 8 to get 2e
