The charges and coordinates of two charged particles held fixed in an xy plane a

Question

The charges and coordinates of two charged particles held fixed in an xy plane are q1 = +2.0 µC, x1 = 3.0 cm, y1 = 0.50 cm, and q2 = -4.0 µC, x2 = -2.0 cm, y2 = 1.5 cm.
(a) Find the magnitude of the electrostatic force on q2.
28N
(b) Find the direction of this force.
-11° (counterclockwise from the +x axis)
(c) At what coordinates should a third charge q3 = +4.5 µC be placed such that the net electrostatic force on particle 3 due to particles 1 and 2 is zero?
x=____cm
y=____cm
I already found the magnitude and direction. All I need is the coordinates

Explanation / Answer

set the force due to q1 and q2 equal to each other. For r, let dx=the distance from q1 to q3 in the x direction, then the distance from q2 to q3 in the x direction is ((x1-x2)-d). Solve for d and you have the x coordinate, and repeat the procedure to find the y coordinate

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