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.
(1) What do I need to declare the titles of primary and secondary school teachers in Jiangxi?
On May 2nd, Jiangxi Province issued a