Asked by Andy
Find all of the points of the form (x, −1) which are 4 units from the point (3,2)
Answers
Answered by
Damon
(x-3)^2 + (-2-1)^2 = 16
x^2 -6 x + 9 + 9 = 16
x^2 - 6 x + 2 = 0
x = [ 6 +/- sqrt(36 -8) ]/2
x= 3 +/- sqrt 7 and y = -1 of course
x^2 -6 x + 9 + 9 = 16
x^2 - 6 x + 2 = 0
x = [ 6 +/- sqrt(36 -8) ]/2
x= 3 +/- sqrt 7 and y = -1 of course
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