Hey everyone! I am in precalculus trig right now and it's been about 7 years since my last math course. Can someone please tell me what I did wrong (probably my algebra?) in solving for the focus for this parabola.

Given equation: x^2 + 4x + 2y +10 = 0

to change to standard form I got: (x-(-2))^2 = 4(-1)(-1/2y - 3/2)

Focus (-2, -5/2) but answer was wrong, should have been (-7/2). Can someone show me how to get this?