3 years ago

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

Mathematics

1 answer:

jek_recluse [69]3 years ago

3 0

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.

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