Question 90170
{{{x^-2=4}}}
Remember that a negative exponent can also be written like this:
{{{1/x^2=4}}}
Solve for x now:
{{{4x^2=1}}}
{{{x^2=1/4}}}
Taking the square root of each side...
x=+-1/2
Good Luck,
tutor_paul@yahoo.com