SOLUTION: Find all points having an x-coordinate of 2 whose distance from the point (-2,-1) is 5

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Question 894248: Find all points having an x-coordinate of 2 whose distance from the point (-2,-1) is 5
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
You are looking for the variable point, (2,y); and use Distance Formula:

sqrt%28%282-%28-2%29%29%5E2%2B%28y-%28-1%29%29%5E2%29=5
sqrt%2816%2B%28y%2B1%29%5E2%29=5
16%2B%28y%2B1%29%5E2=25
%28y%2B1%29%5E2=9
y%2B1=0%2B-+3
highlight%28y=-1%2B-+3%29

y is -4 or +2.