Các câu hỏi tương tự
Tính :
a) 13/15 + 4/7 - 101/105 b) 2/5 + 3/5 + x 4/9 c) 3/4 x 5/2 x 7/6
d) 1/2 : 1/4 - 2/9 e) 2/3 - 1/4 +2/9 g) 5/2 + 1/3 x 3/2
1. -2/9 x 15/17 + -2/9 x 2/17
2. -5/3 x 6/5 + -7/9 x 3/10
3. 15/20 x 7/5 + -9/7 x -6/4
4.-25/13 x 5/19 + -25/13 x 14/19
5 -7/13 x 13/5 + -9/7 x 5/3
6. 27/35 x 5/9 - 2/7 x -7/5
7. 10/13 x 13/5 + {-9/5} x 10/3
8. 100/27 x 9/20 + 40% x 5/3
9. 1,5 x 5/12 + 1/4 x 3/4
10. 2 1/2 x 7/5 + {-9/10} x 2/3
11. X + 45% = 2 1/2 -5/3
12. 80% + X = -5/2 + 3/4
13. 4/25 - X =-5/2 + -3/10
1 tháng 8 2023 lúc 10:40
(x2 + 9) (9x2 -1) = 0
(4x2 -9) (2x-1 -1) =0
( 3x+2) (9-x2 ) =0
(3x+3)2 ( 4x - 42 ) =0
2(x-5) ( x+2) =1
Bài 1:thực hiện phép tính(hợp lí nếu có thể):1, -5/12 x 2/11 + -5/12 x 9/11 + 5/122, -3/5 : 7/5 - 3/5 : 7/5 + 2 3/53, 1/2+ 3/4 - ( 3/4 - 4/5)4, 2/3 + 1/3 x ( -4/9 + 5/6)5, -3/7 x 5/9 + 4/9 x -3/7 + ( - 2022) ^ 06,0,75 - ( 2 1/3 + 0,75) + 3 ^ 2 x ( -1/9)7, 2 6/7 x [(-7/5 - 3/2 : -5/-4) + ( 3/2)^2]8,2/7 + 5/7 x ( 3/5 - 0,25 ) x ( -2)^2 + 35%9, 1 13/15 x 0,75 - ( 11/20 + 25%): 1 2/510, ( -2,4 + 1/3 ) : 3 1/10 + 75% : 1 1/211.5/3 - 5/7 + 5/9 / 10/3 - 10/7 + 10/9
Đọc tiếp
Bài 1:thực hiện phép tính(hợp lí nếu có thể):
1, -5/12 x 2/11 + -5/12 x 9/11 + 5/12
2, -3/5 : 7/5 - 3/5 : 7/5 + 2 3/5
3, 1/2+ 3/4 - ( 3/4 - 4/5)
4, 2/3 + 1/3 x ( -4/9 + 5/6)
5, -3/7 x 5/9 + 4/9 x -3/7 + ( - 2022) ^ 0
6,0,75 - ( 2 1/3 + 0,75) + 3 ^ 2 x ( -1/9)
7, 2 6/7 x [(-7/5 - 3/2 : -5/-4) + ( 3/2)^2]
8,2/7 + 5/7 x ( 3/5 - 0,25 ) x ( -2)^2 + 35%
9, 1 13/15 x 0,75 - ( 11/20 + 25%): 1 2/5
10, ( -2,4 + 1/3 ) : 3 1/10 + 75% : 1 1/2
11.5/3 - 5/7 + 5/9 / 10/3 - 10/7 + 10/9
1/(x+1).(x+2)+.......+1/(x+9).(x+10)=9/10
Tim x
x/13=35/91
9+x/13-x=5/6
x+x:5*7,5+x:2*9=315
2/3*x+1/2=9/10-1/5
tìm X
1/4+2.(3.x-2/3)=1
(1/2+2X). (2x-3)=0
(4x-5).(5/4.x-2)=0
1/9-(2.x+1/2)mũ 2=0
9.(3x-1/2)mũ 2 =4
1/2.x+2/3.x-1=-10/3
X+1/12=-3/9
Bai 1 tim x
2/3 x -3/2 x=5/12
72-3/x+1/=9
7/9 : (2+3/4 x)+5/9=23/27
*Tìm x
(1/2 + 1/3 + 1/4 +........+1/10 ) x X = 1/9 + 2/8 + .....+ 8/2 + 9/1
HEPL ME
32.(x+1)2+4.62=432
=> 9.(x+1)2+4.36=432
=> 9.(x+1)+144=432
=> 9.(x+1)2 = 432-144
=> 9.(x+1)2 = 288
=> (x+1)2 = 288 :9
=> (x+1)2 = 32
=> ....v..v
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