7х²-5х+3 и 7х²-5

To prepare for university exams, it is important to be familiar with basic mathematical operations, such as addition, subtraction, multiplication, and division. Let's start by simplifying the given expressions:

1. 7x² - 5x + 3

This expression cannot be simplified further as it is already in its simplest form. However, if you need to factorize or solve it for x, we could follow those steps.

2. 7x² - 5

Similarly, this expression cannot be simplified further as it is already in its simplest form. Again, if you need to factorize or solve it for x, we could explore those steps.

If you have any specific questions or want to know how to factorize or solve these expressions, please let me know.