Graphing Multiple Function Transformations - Part 1 of 2

This video explains how to graph function in the form y=a*f(b(x+c))+d. Part 1 of 2.

[cynthiasexton-wilson]

Your point table appears to be wrong.
if X = 0, then 2(0) = 0 and 0 - 4 = -4. The square root of -4 = 2i. When you add 1, Y = 2i +1
if X = 1, then 2(1) = 2 and 2 - 4 = -2. The square root of - 2 is i(sq rt 2). When you add 1, Y = 1 + i(sq rt 2).
if X = 4, then 2(4) = 8 and 8 - 4 = 4. The square root of 4 = 2. Add 1 and Y = 3.
if X = 9, then 2(9) = 18 and 18-4 = 14. The square root of 14 = 3(sq rt 5). Add 1 and
y = 4(sq rt 5).

What a I missing here?