2、(x^3-2x^y)÷(-x^2)=-x+2x^(y-2)

3、-2 1a^2b^3÷7a^2b=-3b^2

4、(6a^3b-9a^c)÷3a^2=2ab-3a^(c-2)

5、(5ax^2+ 15x)÷5x=ax+3

6、(a+2b)(a-2b)=a^2-4b^2

7、(3a+b)^2=9a^2+6ab+b^2

8 、( 1/2 a- 1/3 b)^2= 1/4a^2- 1/3ab+ 1/9b^2

9、(x+5y)(x-7y)=x^2-2xy-35y^2

10、(2a+3b)(2a+3b)=4a^2+ 12ab+9b^2

1 1、(x+5)(x-7)=x^2-2x-35

12、5x^3×8x^2=40x^5

13、-3x×(2x^2-x+4)=-6x^3+3x^2- 12x

14、 1 1x^ 12×(- 12x^ 1 1)=- 132x^23

15、(x+5)(x+6)=x^2+ 1 1x+30

16、(2x+ 1)(2x+3)=4x^2+8x+3

17、3x^3y×(2x^2y-3xy)=6x^5*y^2-9x^4*y^2

18、2x×(3x^2-xy+y^2)=6x^3-2x^2*y+2xy^2

19、(a^3)^3÷(a^4)^2=a

20、(x^2y)^5÷(x^2y)^3=(x^2y)^2=x^4*y^2

2 1、(y^3)^3÷y^3÷(-y^2)^2=y^2

22、(-2mn^3)^3=-8m^3*n^9

23、(2x- 1)(3x+2)=6x^2+x-2

24 years old (2/3 x+3/4 y) 2 = 4/9 x 2+xy+9/16 y 2

25、200 1^2-2002×2002=(200 1+2002)(200 1-2002)=-4003

26、(2x+5)^2-(2x-5)^2=(2x+5+2x-5)(2x+5-2x+5)=4x* 10=40x

27、- 12m^3n^3÷4m^2n^3=-3m

28、2x^2y^2-4y^3z=2y^2*(x^2-2yz)

29、 1-4x^2=( 1-2x)( 1+2x)

30、x^3-25x=x(x^2-25)

3 1、x^3+4x^2+4x=x(x+2)^2

32、(x+2)(x+6)=x^2+8x+ 12

33、2a×3a^2=6a^3

34、(-2mn^2)^3=-8m^3*n^6

35、(-m+n)(m-n)=-m^2+2mn-n^2

36、27x^8÷3x^4=9x^4

37、(-2x^2)×(-y)+3xy×( 1- 1/3 x)=2x^2*y+3xy-x^2*y=x^2*y+3xy

38、am-an+ap=a(m-n+p)

39、25x^2+20xy+4y^2=(5x+2y)^2

40、(-4m^4+20m^3n-m^2n^2)÷(-4m^2)=m^2-5mn- 1/4n^2

4 1、( 12p^3q^4+20p^3q^2r-6p^4q^3)÷(-2pq)^2=3pq^2+5pr-3/2p^2*q

42 、[ 4y(2x-y)-2x(2x-y)]⊙(2x-y)= 4y-2x

43、(x^2y^3- 1/2 x^3y^2+2x^2y^2)÷ 1/2 xy^2=2xy-x^2+4x

44、(4a^3b^3-6a^2b^3c-2ab^5)÷(-2ab^2)=-2a^2*b+3abc+b^3

45 、( ax+bx)÷x=a+b

46 、( ma+mb+mc)÷m=a+b+c

47、(9x^4- 15x^2+6x)÷3x=3x^3-5x+2

48、(28a^3b^2c+a^2b^3- 14a^2b^2)÷(-7a^2b)=-4abc- 1/7b^2+2b

49、(6xy^2)^2÷3xy= 12xy ^3

50、24a^3b^2÷3ab^2=8

factoring

X^2-X-6=0

2X^2-3X-2=0

-3X^2+6X=2

4X^2-4X+ 1=0

X^2-2X+3=0

-X^2-2X+8=0

X^2-X-2=4

2X^2-3X+ 1=0

-3X^2+4X+4=0

4X^2- 1 1X-3=3

x^2-2x-3=0

4x^2- 1=0

5x^2-3x+2=0

-x^2-2x+8=0

x^2-8x+ 12=0

2x^2-6x+3=0

2x^2- 1 1x+5=0

4x^2- 16x+7=0

10x^2-9x-7=0

2x^2- 17x-9=0

12x^2+ 16x-3=0

5x^2- 1 1x+2=0

2x^2-9x+9=0

2x^2+3x-9=0

Equation.

1，x-y=2

xy= 15 (x=5，y=3)

2，x+y=6

x-y=2 (4，2)

3，x+y= 1 1，xy=30 (x=5，y=6，x=6，y=5)

4，x+y= 13，xy=42 (x=6，7，y=7，6)

5，x+y= 1 1，x-y= 1 (x=6，y=5)

6，x+y= 12，xy=35 (x=5，7，y=7，5)

7，x+y=5，xy=6 (x=2，3，y=3，2)

8，x-y=5，xy=36 (x=6，y= 1)

9，x+y= 10，xy=25 (x=y=5)

10，x+y= 17，y-x= 1 (x=8，y=9)

1 1，xy=2，x-y= 1 (x=2，y= 1)

12，x+y=3，xy=2 (x= 1，2，y=2， 1)

13，x+y= 12，xy= 1 1 (x= 1， 1 1，y= 1 1， 1)

14，x-y=8，xy=9 (x=9，y= 1)

15，x+y=4，x-y=2 (x=3，y= 1)

16，x+y=3，xy=0 (x=0，3，y=3，0)

17，x-y=5，xy=6 (x=6，y= 1)

Simplified assessment

The square is 1. Given | a+3 |+(b- 1) = 0, find the value of 3a-2ab+b.

2. Given (a-1)+4 (b+2)+| c+1| = 0, find the value of (a-ac+c)-2 (a+bc-2c).

3.(3x-2y-3xy)-(2x-3y+xy), where x+y = 2 and xy =- 1.

(-a-ab+b)-(-a+2ab+b), where a =-115 and b = 10.

5. It is known that | a+ 1/2 |+(b-3) = 0. Find the value of the algebraic expression [(2a+b)+(2a+b) (b-2a)-6b] \ (2b). 6.10a (5 times the square of a-b)-2a (25 times the square of 5b+a)-3ab, where a = 1 and b =1/23.7.1/3x3-2x2+2/.

8.5abc-{2a2b [3abc-(4ab2-a2b)]-2ab2} where a =-2, b = 3 and c =- 1/4.

9. Given a2+a- 1=0, find the value of the algebraic expression a3+2a2+5.

The quadratic form of10. (a+2)-(a-1) (a+1), where a = 3.25 is simplified first and then evaluated.

1 1.(X- 1) quadratic +(x+3) (x-3)+(x- 1), where the quadratic of x -2x =2.

12. It is known that A +b = 12, and the square of A+the square of B =74 to find the value of ab.

13. Simplify first, and then find the square of (4x-3y) -(3x-2y)(3x+2y), where x = 2 and y = 1.

14. Simplified evaluation: (1+a-5a)-(- a +2a), where a=-3.

15. Given 3/3 a=4/3 b=5/3 C, find the value of 2a+b+c in the algebraic expression 2b-a.

16.(x-3) 2+| y+2 | = 0, then the value of yx is ().

17. let a, b and c be rational numbers, and |a|+a=0, |ab|=ab, |c|-c=0 to find the value of the formula | B |-| A+B |-C-B |+| A-C |.

18.9x+6x 2-3 (x-2/3x 2), where x =-29x+6x2-3x+11/3x2 = 6x+29/3x2 = 6 * (2

19.1/4 (-4x2+2x-8)-(1/2x-1), where x =1/2-x2+1/2x-.

⑴5x(a-b)^2-3y(b-a)

=5x(a-b)^2+3y(a-b)

=(a-b)(5xa-5xb+3y)

⑵(y+ 1)(y^2- 1)-(y+ 1)^3

=(y+ 1)^2(y- 1)-(y+ 1)^3

=(y+ 1)^2(y- 1-y- 1)

=-2(y+ 1)^2

⑶2( 1-x^2)+6a(x- 1)^3

=-2(x+ 1)(x- 1)+6a(x- 1)^3

=(x- 1)(-2x-2+6ax^2- 12ax+6a)

⑷(x-m)^3(x-n)+(x-m)^2(n-x)

=(x-m)^3(x-n)-(x-m)^2(x-n)

=(x-m)^2 (x-n)(x-m- 1)

⑸-a(b-a)^2-ab(a-b)^2+ac(b-a)^2

=(b-a)^2(-a-ab+ac)

=-a(b-a)^2( 1+b-c) 1.ma+mb=

=m(a+b)

2.x^2-25=

=(x+5)(x-5)

3.x^2+6x+9=

=(x+3)^2

4. Fill in the brackets: 2x-3y+ 1=2x-(3y- 1)

5. Calculation: (2x 2-4xy)÷(x-2y)= 1

=2x(x-2y)/(x-2y)

=2x

6. Decomposition coefficient: 18A 4x 2+24a 2x 2y+8x 2y 2

=2x^2(9a^4+ 12a^2y+4y^2)

=2x^2(3a^2+2y)^2

Is it almost there?