Friday, October 11, 2013

sqrt(x+4)=x+4

sqrt%28x%2B4%29=x%2B4
%28x%2B4%29-sqrt%28x%2B4%29=0 
sqrt%28x%2B4%29%28sqrt%28x%2B4%29-1%29=0 
x=-4 
or 
sqrt%28x%2B4%29%5E2-1%5E2=0
x+4=1
x=-3 
solution set: {-3, -4}
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