A.a-(3b-2c) = cube x of a-3b-2cb-(2x quadratic+x-1) = x -(2x quadratic -x- 1 C.a cubic +(-2a+3)=a cubic =

2. Given that the cube of A =x+x+ 1 and the quadratic of B = x+x, calculate:

( 1)2A-3B； (2)3B-2A。

3. It is known that | a+1|+(a-b-2) = the square of 0. Simplify ab-2d{ab-[3a's square b-(4ab's square +0.5ab)-2a's square b]}-3ab, and find its value.

4. It is known that the cubic of a =-the quadratic of 3a +2a- 1, and the cubic of b = 2a+the quadratic of 2a-4a-5. When a=- 1, find the value of 3A-2 (2B+A-B/2).

5.x stands for two digits and Y stands for three digits. If X is placed on the left of Y to form a five-digit M 1 and Y is placed on the seat of X to form a five-digit M2, it is proved that M 1-M2 is a multiple of 9.

6. There is a topic: Calculate the square of a polynomial minus X -3x+2. If you use "plus" instead of "minus", you will get the square of 2x -2x+ 1 What is the positive solution of the original question?

7. Given 2x-3=0, find the value of the algebraic expression x(x squared -x)+x squared (5-x)-9.