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There are 12 ordered pairs of integers (x,y) that satisfy x^2 + y^2 = 25. What is the sum of all the x-values?

 Jul 16, 2022
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         x    y

1 = (0, -5)
2 = (-3, -4)
3 = (3, -4)
4 = (-4, -3)
5 = (4, -3)
6 = (-5, 0)
7 = (5, 0)
8 = (-4, 3)
9 = (4, 3)
10 = (-3, 4)
11 = (3, 4)
12 = (0, 5)

Add up all the x values to the left.

 Jul 16, 2022

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