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

-2x2+x+3=0

2x^2+3x-9=0

x^2-9=0

4x^2- 10x-6=0

5x^2-8x-4=0

3x^2+4x-4=0

6x^2+7x-5=0

x^2-8x+ 12=0

2x^2-6x+3=0

2x^2+9x-5=0

3x^2- 16x+5=0

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

4x^2- 16x+7=0

10x^2-9x-7=0

2x^2- 13x-7=0

2x^2-3x-2=0

-2x^2+3x- 1=0

2x^2- 17x-9=0

2x^2-x-6=0

12x^2+ 16x-3=0

6x^2- 13x+2=0

3x^2-7x+2=0

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

2x^2-9x+9=0

2x^2+3x-9=0

x^2+2x-3=0

x^2-6x+5=0

x^2-3x+2=0

x^2- 12x+32=0

x^2+6x- 16=0

3x^2- 12x- 15=0

2x^2- 1 1x-2 1=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)

18，y-x=3，xy=28 (x=4，y=7)

19，y-x=2，xy=24 (x=4，y=6)

20，x+y=9，x-y= 1，(x=5，y=4)

21.66 x+17y = 396725x+y =1200 answer: x=48 y=47.

22.18x+23y = 230374x-y =1998 answer: x=27 y=79.

23.44x+90y=7796 44x+y=3476 Answer: x=79 y=48.

(4) 76x-66y=4082 30x-y=2940 Answer: x=98 y=5 1.

(5) 67x+54y = 854671x-y = 5680 Answer: x=80 y=59.

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

9. known a? +a- 1=0, find the algebraic expression a? +2a？ The value of +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-.

20.(5a 2-3b 2)+(a 2+b 2)-(5a 2+3b 2), where a =- 1, b = 1 5a 2-3b 2+a 2+b 2.

21.2 (a2b+ab2)-2 (a2b-1)-2ab2-2, where a =-2 and b = 22a2 * 2b+2ab2-2a2 * 2b-2a.

The process is too difficult. Pick me.