Hello!
If x² equals 1/100, then x equals 1/10 or -1/10.
I hope it helps!
[tex] x^2=\dfrac{1}{100}\\\\x=\sqrt{\dfrac{1}{100}} \vee x=-\sqrt{\dfrac{1}{100}}\\\\x=\dfrac{1}{10} \vee x=-\dfrac{1}{10} [/tex]