The square root of -1 is i. So you can simplify it to 7(sqrt)-1, which becomes 7i.
Answer: A
Step-by-step explanation:

We need to get this form: 
we need to begin by isolating y on the left side. To do this, we must subtract 4x.

Rewrite it so that we get this form: 

Since y needs to be completely isolated, divide by 4.

Divide;

Answer:
(-2, -8)
(-1, -1)
(1, 1)
(2, 8)
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