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Whats the name of the vertical axis

The clayton family’s pool has vertices at the coordinates (0, 2), (0, 5), (2, 5), (2, 6), (5, 6), (5, 1), (2, 1), and (2, 2). if each grid square has an area of 9 square feet, what is the area of the pool?

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]