SOLUTION: explain in detail please: find all points having an x coordinate of 2 whose distance from the point (-2,-1) is 5.

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Question 990626: explain in detail please: find all points having an x coordinate of 2 whose distance from the point (-2,-1) is 5.
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
(2,y) to be 5 units from (-2,-1).

THIS is the use of the Distance Formula:
sqrt%28%282-%28-2%29%29%5E2%2B%28y-%28-1%29%29%5E2%29=5

These are the possible sequence of arithmetic steps to solve the equation for y.

%282%2B2%29%5E2%2B%28y%2B1%29%5E2=25

%28y%2B1%29%5E2=25-16

y%2B1=0%2B-+sqrt%289%29

y=-1%2B-+3

y=-4 or y=2
ANSWER DONE.