2. Except for the first and second questions, unless otherwise specified, the main steps of proof or calculation should be written.

1. Fill in the blanks: (This title is *** 12, with a full score of 36) [Only write the results directly, and fill in 3 points correctly in each blank, otherwise it will be zero].

1. Calculation:

.

2. Factorization:

.

3. Simplify:

.

4. Known functions

, then

.

5. Function

The field is

.

6. If equation

The two real roots of are

, then

.

7. Equation

The root of is

.

8. As shown in figure 1, the image of the proportional function passes through this point.

, the resolution function is

.