Answer: y = 3
Explanation:
The objective is to get 0 on the left side to equal the 0 on the right side. I'd like to do this by making the sum of x^2 and y^2 equal to 10. If (x^2+y^2) = 10, the -10 on the left side will cancel it out to equal 0.
1^2 = 1
3^3 = 9
1 + 9 = 10
Therefore, x is 1 and y is 3.
x^2 + y^2 - 10 = 0
1^2 + 3^2 - 10 - 0
1 + 9 - 10 = 0
10 -10 = 0
0 = 0