For the questions 1 and 13, firstly, the conditions are processed, and the exponent of 2 is taken on both sides at the same time, and the following results can be obtained:

2 to the power of m equals 3. Putting this condition behind is easy to get the result:

3? +3? =36

2. According to the condition: (x, y) is a triangle surrounded by three straight lines, then

The maximum value of 5x-3y must be obtained at the three vertices of the triangle.

Note: This conclusion can be recorded. In the future, similar problems, whether the maximum value or the minimum value, must be solved at a vertex of a triangle (or polygon).

3. Calculate the coordinates of the three vertices.

4. Enter the formula verification one by one, and the minimum value is the required vertex coordinates.

5. Bring the vertex coordinates into the following formula for calculation.

The process is short, you can leave a message for consultation if you have any questions.