Simple...
it's saying [tex] x^{2} =i?[/tex]
To find the answer just take the root of both sides and solve.
[tex] \sqrt{ x^{2} } = \sqrt{i} [/tex]
But, remember, there's the positive side of the answer...and the negative side of the answer...
x=[tex] \sqrt{i} ,- \sqrt{i} [/tex]
Thus, your answer.
