For this case we must solve the following equation:
[tex]x ^ 2 = 3[/tex]
So we have to:
Applying square root to both sides of the equation:
[tex]x = \pm \sqrt {3}[/tex]
Thus, we have two roots:
[tex]x_ {1} = \sqrt {3} = 1.7321\\x_ {2} = - \sqrt {3} -1.7321[/tex]
Answer:
[tex]x_ {1} = 1.7321\\x_ {2} = - 1.7321[/tex]