Answer :
Ok, so
We can use this method if we have a quadratic equation of the form:
[tex]x^2-c=0[/tex]When c is a real number. In other words, we can extract the roots if we first isolate the leading term, x².
For example:
Find the roots of the quadratic equation:
[tex]x^2-4=0[/tex]Notice that all the "x terms" should be in a side of the equation and all the numbers should be in the other side.
This is:
[tex]x^2=4[/tex]Now, we could apply the square root property:
[tex]x=\pm2[/tex]