y = x2 + 12x + 308x − y = 10
So you need the solve for x and y ?from 8x-y = 10,y = 8x -10Plug this in other equation.8x-10 = x^2 +12x + 30Re-arrange and combine like terms,x^2 +12x -8x +30+10 = 0 x^2 +4x +40 = 0This does not have any real solutions.So there are no real values of x and y satisfying the 2 equations.Are you sure the question is correct? or if this question belongs to complex numbers topic?