Question

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

Answer 1

only -7

Explanation:

Just plug them in.

so for x=-7
`√(-2(-7)-5)=(-7)+4\\√(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.