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A point (2,n) is 5 units away from the point (-1,1). What is the product of all possible integer values for n?

 Apr 15, 2020
 #1
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Use distance formula

 

(2- -1)^2  + (n-1)^2 = 5^2

9            + n^2 -2n+1 = 25

n^2 -2n -15 = 0      

(n-5)(n+3) = 0                 n = 5   or  -3

 Apr 15, 2020
 #2
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Thank you! 

 Apr 15, 2020
 #3
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You are welcome.....I hope you understand the solution method !  cheeky

ElectricPavlov  Apr 15, 2020

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