Advanced Math

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find all points having an x-coordinate of 2 whose distance of the point (-1-2)is 5.

  • Advanced Math -

    all points having a distance of 5 from (-1, -2) lie on a circle with equation
    (x+1)^2 + (y+2)^2 = 25
    you want the x to be 2
    3^2 + (y+2)^2 = 25
    (y+2)^2 = 16
    y + 2 = ± √ 16 = ± 4

    if y+2 = 4, then y = 2
    if y+2 = -4, then y = -6

    so your points are (2,2) and (2,-6)

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