Solve for x in terms of y: a) y=-4(x-2)^2+1

Answer 1

y=-4(x-2)^2+1
4(x-2)^2 = 1-y
(x-2)^2 = (1-y)/4
x-2 = ±√(1-y)/2
x = 2±√(1-y)/2