(1).3a(2a square-1) (2).6x(4-3x square +2x cubic)

(3).=2 1x cube y square -7x square y cube

=7x squared y squared (3x-y)

(4).9m squared n squared (mn squared -3m squared n+9)

4. Factorization:

(1).25a(2-a) (2).3x(x square -3x+ 1) (3).2x square y(9xy+6y-x)

(4).-2mn( 1-2n+3m square) (5). -9a square b square c square (5a square c-2a- 10)

(6) 16x square y square z square (xz+3x square y-6z square)

5. Fill in the blanks:

( 1) a-b

(2) 2y+x-3

(3) -

(4) 5

(5) -x+y-3

6. Fill in the following items in the corresponding circles as required:

A monomial with a factor of 2ab: 18a square b, 4b square a, 6a cubic b, 36ab cubic, -8ab.

A monomial with a factor of 2a: 18a square b. . . . . . . . . . . . . . . . . . . . . . . .

Ah, ah, ah . . I gave up. . . . . . . . . . .

You have to type until the date of birth. . . . . . . . . . . .

Despise . . . . . . . . . . . . . . . . . .

Well, if it's a cube, change the words to small numbers. .