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Check the position of the Point (5,6)(5,6) with respect to its circle 2x2+2y2+12x8y+1=02x^2+2y^2+12x-8y+1=0

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Q. Check the position of the Point (5,6)(5,6) with respect to its circle 2x2+2y2+12x8y+1=02x^2+2y^2+12x-8y+1=0
  1. Convert to Standard Form: Convert the given circle equation into the standard form.\newlineThe standard form of a circle's equation is (xh)2+(yk)2=r2(x - h)^2 + (y - k)^2 = r^2, where (h,k)(h, k) is the center of the circle and rr is the radius.\newlineGiven equation: 2x2+2y2+12x8y+1=02x^2 + 2y^2 + 12x - 8y + 1 = 0\newlineDivide the entire equation by 22 to simplify: x2+y2+6x4y+12=0x^2 + y^2 + 6x - 4y + \frac{1}{2} = 0
  2. Complete the Square: Complete the square for both x and y.\newlineFor x: Take half of the coefficient of x, square it, and add it to both sides: (x+3)29(x + 3)^2 - 9\newlineFor y: Take half of the coefficient of y, square it, and add it to both sides: (y2)24(y - 2)^2 - 4\newlineNow add 99 and 44 to both sides to balance the equation: (x+3)2+(y2)2=9+412(x + 3)^2 + (y - 2)^2 = 9 + 4 - \frac{1}{2}
  3. Simplify Equation: Simplify the right side of the equation.\newline9+412=1312=12.59 + 4 - \frac{1}{2} = 13 - \frac{1}{2} = 12.5\newlineSo the equation of the circle in standard form is: (x+3)2+(y2)2=12.5(x + 3)^2 + (y - 2)^2 = 12.5
  4. Determine Center and Radius: Determine the center (h,k)(h, k) and the radius rr of the circle.\newlineFrom the standard form, we have h=3h = -3, k=2k = 2, and r2=12.5r^2 = 12.5.\newlineTherefore, the center of the circle is (3,2)(-3, 2) and the radius is 12.5\sqrt{12.5}.
  5. Plug in Coordinates: Plug the coordinates of the point (5,6)(5,6) into the circle's equation to determine its position.\newlineSubstitute x=5x = 5 and y=6y = 6 into the standard form: (5+3)2+(62)2=12.5(5 + 3)^2 + (6 - 2)^2 = 12.5\newlineCalculate: (8)2+(4)2=12.5(8)^2 + (4)^2 = 12.5\newline64+16=12.564 + 16 = 12.5\newline8012.580 \neq 12.5
  6. Compare Results: Compare the result with r2r^2 to determine the position of the point.\newlineSince 80 > 12.5, the point (5,6)(5,6) lies outside the circle.

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