What Mathematics/Physics textbooks would you recommend?

Question

Mathematics

I am slowly finishing the 9th grade, it remains only to pass the OGE in Russian and that's it - the beginning of the holidays. And I don't want to waste my vacation.
1) Mathematics.
I got a B in 7th grade in math. Three in 8th grade. Now in the 9th grade I have five, but for some reason I don’t really like my “five”. I think I know 4. Therefore, I would like to strengthen my knowledge in order to be confident in myself. Also, after fixing the material covered, I would like to move on to the 10th grade, the "Beginning of Analysis" is painfully beckoning me.
In general, I want to write the exam for a high score, and for this, as I already understood, you need to spend a lot of time preparing, since it will not be enough just to start preparing in the 11th grade.
In the next academic year, I'm thinking of going to the Olympiad. I myself have never participated in the Olympiads, so I want to test my strength.
I don't know which books are better to read, so I decided to ask you.
2) Physics.
I don’t know why, but in the 9th grade I really fell in love with this subject. Sometimes, walking alone down the street, I like to think about different topics, for example, what speed would a person develop when falling from the 5th floor, how much Newton would his bones experience during such a fall, or how bad the pilot is with a "dead loop"). In general, not only school textbooks are interesting, but also various articles. Articles are articles, but of course no one canceled the school curriculum. As well as with mathematics, I want to pass the exam well, well, go to the Olympiad.
I would be grateful for any answers/advice/recommendations.

Answer 1

Regarding the USE:
You can pass the USE well simply by mastering the school curriculum.
I passed the 5th exam preparing only at school - without tutors, without cheat sheets, I didn’t even repeat anything at home. Before the exams, I went to the river to rest, the worst result was social science 64. I had enough points to leave Chita for St. Petersburg.
The curriculum is sufficient. The USE is just the first more or less serious exam, at the university there are about 10 of them a year))
According to the Olympiad:
It will be useful to decide Arnold V.I. - Problems for children from 5 to 15 years old
+ you can search for various Olympiad problems on the Internet and solve them.
Additional tips:
Everything in life is useful, but there is not enough time for everything, so it is better to study in this order:
1) Necessary
2) What you like and are interested in
3) The rest
Therefore, I recommend in mathematics:
Study all the chapters of the textbook, solve all the tasks of the problem book.
Solve several trial exams (You can already now).
For extra practice - solve Scanavi problems, the more the better. The main thing is to develop the skill of solving any kind of problems.
Likewise with physics.