Forces in a three-charge system. I have tried so many times and don\'t know why

Question

Forces in a three-charge system.

I have tried so many times and don't know why it's still wrong.

I've tried -4.0*10^-5 N , -9.08*10^-6 N, -7.52*10^-6 N, and even 7.52*10^-6 N. I only have 2 attempts left, pls HELP! thank you!!

Forces in a Three-Charge System Coulomb's law for the magnitude of the force F between two particles with charges Qand Q separated by a distance d is where K Tree and eo 8.854 x 10-12 C2/(N m2) is the permittivity of free space. Consider two point charges located on the x axis one charge, q 12.0 nC is located at 1.690 m; the second charge go 32.5 nC, is at the origin (r 0.0000) Part A What is the net force exerted by these two charges on a third charge g3 45.0 nC placed between and at 23 1.160 m Your answer may be positive or negative, depending on the direction of the force Express your answer numerically in newtons to three significant figures. Force on g3 7.52 10 d Submit Hints My Answers Give Up Review Part Incorrect, Try Again, 2 attempts remaining

Explanation / Answer

q1 = -12 nC, q2 = 32.5 nC, x1 = -1.69 m , x2 = 0 m

q3 = 45 nC, x3 = -1.16 m

electric force F = kq1q2/r^2

F3 = F31 +F32

F3 =- (8.854*10^9*12*45*10^-18/(1.69-1.16)^2) -(8.854*10^9*32.5*10^-9*45*10^-9/1.16^2)

F3 = -2.66*10^-5 N

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