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Question

The coordinates of the point P are (-3, 2). Find the coordinates of the point Q which lies on the line joining P and origin such that OP = OQ.

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Solution

Coordinates of P = (-3, 2)
Coordinates of origin = (0, 0)
Let the coordinates of Q = (x, y)
Given that OP = OQ ⇒ O is the midpoint of the line joining P and Q
Midpoint of the line segment joining (x1, y1) and (x2, y2) = (x1+x22, y1+y22)​​​​​​​

Midpoint of PQ = (3+x2, 2+y2) ​​​ = (0, 0)

3+x2= 0 ⇒ x = 3


2+y2= 0 ⇒ y = -2
The point Q is (3,-2)


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