SOLUTION: Find X if the distance between points A and B is 13 and B is located in the second quadrant. A=(5,-1) B=(x,4)

Question 1139671: Find X if the distance between points A and B is 13 and B is located in the second quadrant.
A=(5,-1)
B=(x,4)
Answer by ikleyn(52835) (Show Source): You can put this solution on YOUR website!
.

 +  = 


 +  = 169


 + 25 = 169


 = 0.


(x-17)*(x+7) = 0


There are two roots x= 17  and  x= -7,  and only negative root x= -7  provides the point B in QII.


ANSWER.  x = -7.

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