This is just an introduction to mathematics, but it already assumes some knowledge about mathematics. In the first equation it uses the superscript 2 for squaring without explaining it. It also does not explain that 'ab' stands for a and b multiplied.
It also does not address the fact that mathematics is a form of modeling. In reality there are no numbers, there are only number of things or distances. Mathematics is also the use of a language, with specific rules, to describe and reason with those models.
This is just an introduction to mathematics, but it already assumes some knowledge about mathematics. In the first equation it uses the superscript 2 for squaring without explaining it. It also does not explain that 'ab' stands for a and b multiplied.
It also does not address the fact that mathematics is a form of modeling. In reality there are no numbers, there are only number of things or distances. Mathematics is also the use of a language, with specific rules, to describe and reason with those models.