Those were the key maths textbooks for my engineering degree. Personally I wouldn't recommend starting there to learn maths relevant to electronics. For a start, only a minority of the content would actually be useful I'd have thought, but secondly reading textbooks is a pretty hardcore way to go about teaching yourself a topic that you already know you struggle with.
As others have said I'd look at free resources first, there is loads out there these days, and you'll be able to get information at the right level. Probably easier to keep up interest and stay engaged too.
Also a note of caution about 'getting into electronics' - I'm not sure what your long term plans are and if this is intended as a career move or a hobby, but if you're looking to get a job in electronics I think the vast majority of employers will be looking for some kind of apprenticeship / vocational qualification / degree rather than pure skills.