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# Plz help physics... ?

So I tried doing this and u know it's actually very easy with coulomb's law... and I did it as my teacher told me how to do. But I can't find the right answer i get +21.67 plz help

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- oubaasLv 71 month agoFavorite Answer
F = 9*10^9*3.5*(8/0.01+2.5/0.0225)*10^-12 = 28.7 N (charges with the same sign repel each other)

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Hey thx may u ask what equation u used as my teacher never showed me the one u used?