Question

2√x + 8 = -2

Answer 1

Transpose 8 to other side. Then divide the result by 2. After that, square the whole equation. Did you get it? @charlieberzak

Answer 2

we need x.. so you should square sqrt(x) , and is better to move x to one side and numbers to the other side so we'll have:
2(sqrt(x))=-2-8
2(sqrt(x))=-10
sqrt(x)=-5
so it will be imaginary number

Answer 3

i think so.. so im guessing the answer to this question would be no real solution? O_o

Answer 4

Yes. But you can provide an answer as positive and negative 5i, i think. To indicate that you got an imaginary answer.

Answer 5

okay, thx!