Question 59318
{{{x^2=49}}}
{{{sqrt(x^2)=+-sqrt(49)}}}  
When you take the square root of both sides you must keep in mind that 7*7=49 and -7*-7=49
x=-7 and x=7
:
Another way to come up with both answers is:
{{{x^2-49=49-49}}}
{{{x^2-49=0}}} Factor
{{{(x+7)(x-7)=0}}}
x+7=0 and x-7=0
x=-7 and x=7
Happy Calculating!!!