I'm having trouble doing these problems:

1. Solve the equation

What are the 2 solutions? I get -1 and 4 but apparently I'm wrong

2. The polynomial can be factored into the product of three polynomials, A*B*C. Find A B and C.

No clue how to do this one.

3. The polynomial can be factored into the product of two polynomials, A*B. Find A and B.

Now I got one of the factors to be 9x-8y but i can't find the other.