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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?

 Sep 23, 2021
 #1
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For each value of $x,$ there is a negative value of $x.$ So, the answer to this problem is $\boxed0$

 Sep 23, 2021
 #2
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The answer is stated in the question !! There are 12 pairs as follows:

 

 x       y

  0     -5       
-3     -4
3      -4
-4    -3
4     -3
-5     0
5      0
-4    3
4     3
-3   4
3    4
0    5

 Sep 23, 2021

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