hi :)
i think i know how to do this question, but anyone feel free to correct me.
you need to complete the square on the RHS of the original equation.
so you get: 4y+4 = x^2+4x+4+8 (simplify x^2+4x+4 into perfect square form)
4y+4 = (x + 2)^2 + 8 (carry 8 over to...