Question

Please help me with this problem. I am not sure if I am correct.

Answer 1

Answer:

only -7

Step-by-step explanation:

Just plug them in.

so for x=-7 $\sqrt{-2(-7)-5}=(-7)+4\\\sqrt{9}=-3 \\ 3=-3$So this one is extraneous

Then if you plug -3 in you get 1 = 1 so this one is not extraneous.  if you need me to work this one out let me know.