7. what are the solutions of the equation? x2 = 11x − 24

Assuming you typed this correctly, and how you wanted it, then the answer(s) would be x=3, or x=8. Both answers are correct. If it were multiple choice, then the answer would look something like: X=3 or 8.
If you meant 2x, then the answer would be x=8/3. This is a fraction

B. (2x + 3y)(x - y)

Step-by-step explanation:

              Write x y as a difference

   Factor out x from the equation

  Factor out 2x+3y from the expression

              <----- Answer