Math Problem Statement

Find the point on the y-axis that is equidistant from the points (-5, -2) and (3, 2).

Solution

The question in the image is in Gujarati, and it reads:

(-5, -2) અને (3, 2) થી સમાન અંતરે હોય તેવું y-અક્ષ પરનું વિંદુ શોધો.

Translation:

"Find the point on the y-axis that is equidistant from the points (-5, -2) and (3, 2)."

Solution:

To find a point on the y-axis that is equidistant from two given points, let the coordinates of the point on the y-axis be (0,y)(0, y).

We need to find yy such that the distance from (0,y)(0, y) to both (5,2)(-5, -2) and (3,2)(3, 2) is the same.

Step 1: Distance Formula

The distance between two points (x1,y1)(x_1, y_1) and (x2,y2)(x_2, y_2) is given by the formula:

d=(x2x1)2+(y2y1)2d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2}

Step 2: Set the two distances equal

  1. Distance between (0,y)(0, y) and (5,2)(-5, -2): d1=(0(5))2+(y(2))2=52+(y+2)2=25+(y+2)2d_1 = \sqrt{(0 - (-5))^2 + (y - (-2))^2} = \sqrt{5^2 + (y + 2)^2} = \sqrt{25 + (y + 2)^2}

  2. Distance between (0,y)(0, y) and (3,2)(3, 2): d2=(03)2+(y2)2=32+(y2)2=9+(y2)2d_2 = \sqrt{(0 - 3)^2 + (y - 2)^2} = \sqrt{3^2 + (y - 2)^2} = \sqrt{9 + (y - 2)^2}

Step 3: Equate the two distances

25+(y+2)2=9+(y2)2\sqrt{25 + (y + 2)^2} = \sqrt{9 + (y - 2)^2}

Squaring both sides:

25+(y+2)2=9+(y2)225 + (y + 2)^2 = 9 + (y - 2)^2

Expanding both sides:

25+y2+4y+4=9+y24y+425 + y^2 + 4y + 4 = 9 + y^2 - 4y + 4

Simplify:

29+y2+4y=13+y24y29 + y^2 + 4y = 13 + y^2 - 4y

Cancel out y2y^2 on both sides:

29+4y=134y29 + 4y = 13 - 4y

Add 4y4y to both sides:

29+8y=1329 + 8y = 13

Subtract 29 from both sides:

8y=13298y = 13 - 29

8y=168y = -16

Solve for yy:

y=168=2y = \frac{-16}{8} = -2

Thus, the point on the y-axis is (0,2)(0, -2).

Final Answer:

The point on the y-axis equidistant from (5,2)(-5, -2) and (3,2)(3, 2) is (0,2)(0, -2).


Would you like more details or have any questions? Here are some related questions:

  1. How do we calculate the distance between two points in 2D space?
  2. What other methods can we use to find equidistant points on different axes?
  3. How does the y-axis simplify finding the equidistant point?
  4. Can we use symmetry to predict the point on the y-axis?
  5. How would this change if the point needed to be on the x-axis instead?

Tip: When finding points equidistant from two points, always use the distance formula and look for symmetry in the problem to simplify calculations.

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Math Problem Analysis

Mathematical Concepts

Coordinate Geometry
Distance Formula
Equidistance

Formulas

Distance formula: d = sqrt((x2 - x1)^2 + (y2 - y1)^2)

Theorems

Equidistant Point Theorem

Suitable Grade Level

Grades 9-12