Posted by Lucy on .
Which of the following is NOT a root of z^2 = 1sqrt3i to the nearest hundreth.
a) 0.22+1.24i
b) 0.970.81i
c) 1.020.65i
d) 1.180.43i
Thanks for any help you can give me.

Precalculus 
drwls,
I don't get it. NONE of those numbers, when squared, give you anything close to 1  i sqrt3. In polar form r(e^i theta), the magnitude r of a valid answer would have to be 2. None of the four choices comes close.

Precalculus 
Reiny,
I agree with drwls.
I simply squared some of your answers and should have gotten 1√3i
none worked, so none are roots.