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Thread: locus help

  1. April 24th 2008, 05:52 PM #1
    sux@math
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    locus help

    Can this be right?

    Find the equation of locus points that are one unit from (-5, 2).

    my book has this answer:

    Let P(x,y) represent the set of points. Using the formula for distance between two points . . .

    \sqrt{(x-(-5))^2+(y-2)^2}

    (x+5)^2+(y-2)^2=1^2

    (x+5)^2+(y-2)^2=1

    Does this compute to everyone? I don't understand how they go from 1^2 to 1 ! What am I missing?
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  2. April 24th 2008, 07:43 PM #2
    TKHunny
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    3^{2} = 9

    2^{2} = 4

    1^{2} = 1
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