Choose the solution (s) of the following system of equations x2 + y2 = 6 x2 - y = 6

The system is : (i) x^{2} + y ^{2} = 6 and (ii) x^{2} - y=6 rewrite equation (ii) as x^{2} = y+6 and substitute x^{2} in equation (i) with y+6 so equation (i) becomes (y+6) + y ^{2} = 6 y ^{2} + y = 0 factorize to find the roots