Sunday, May 26, 2013

Find all points on the y-axis that are 6 units from (4, -3).

We'll use this form: 

%0D%0Ad%5E2=%28x%5B2%5D-x%5B1%5D%29%5E2%2B%28y%5B2%5D-y%5B1%5D%29%5E2%0D%0A 

%0D%0A6%5E2=%284-0%29%5E2%2B%28-3-y%5B1%5D%29%5E2%0D%0A 



%0D%0A%28-3-y%5B1%5D%29%5E2=36-16%0D%0A 


%0D%0Ay%5B1%5D=sqrt%2810%29-3%0D%0A 
or 

%0D%0Ay%5B1%5D=-sqrt%2810%29-3%0D%0A 



:) 
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