Y = x2 + 12x + 30

8x - y = 10

So you need the solve for x and y?

from 8x-y = 10,

y = 8x - 10

Plug this in other equation.

8x-10 = x^2 + 12x + 30

Re-arrange and combine like terms,

x^2 + 12x - 8x + 30+10 = 0

x^2 + 4x + 40 = 0

This 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?