This is not calculus; it is algebra.
That can be rearranged to give you
(x-4)^2 = 4-y
Then take the square root of both sides and add 4.
x = sqrt(4-y)+4
How do I solve for x in:
y = -(x-4)^2 + 4
2 answers
lol yeah algebra, ok that's what I got, just making sure.