P 15: fill in the blanks 1. Coefficients 6, -3, 1, 1, 4/9, -3/5. Multiply 1, 5, 3, 3, 2, 2.

2.4、4。

3.6a+ 10b。

4. 1/3

5. 1、 1/9

6. 100

7.x^-y^-2xy x^+y^+2xy

8.-3x^+4x+8

9.3

10.ab+ac+bc

1 1.-2x^+5xy-2x^

12.2

13.-3

14.(2a+3b) 12ab-4a^-9b^

15.(x- 1)(x+ 1)=x^- 1

16.75

Select1d2c3d4b5b6dA8c9b10a11d.

Answer 1.7x+4y

2.-3x^+ 14y+ 10

3.6a3+8a^+ 10a-8

4.-a6

5.-3/8a^b3+ 1/2a^b^- 1/3ab^

6.3 * 10 7 power

7.2x^-7x+6

8.2a^-3ab+6a^

9. 10 cubic meter

I'm so tired, so tired.