Two charged objects and observation point PP lie in the x$$yx$$y plane. The contributions to the electric field at PP due to the objects are

E$1$E$2==$E$1$i$^$E$2$j$^$E$1=$E$1$i$^$E$2=$E$2$j$^$

where E$1=4\mathrm{.}26$N$/$CE$1=4\mathrm{.}26$N$/$C and E$2=2\mathrm{.}43$N$/$CE$2=2\mathrm{.}43$N$/$C$.$