`2x + 2/5 = -x - 3/2`
`=> 2x + x = -3/2 - 2/5`
`=> 3x = -15/10 - 4/10`
`=> 3x = -19/10`
`=> x = -19/10 : 3`
`=> x = -19/30`
Vậy ...
`2x + 2/5 = -x - 3/2`
`=> 2x + x = -3/2 - 2/5`
`=> 3x = -15/10 - 4/10`
`=> 3x = -19/10`
`=> x = -19/10 : 3`
`=> x = -19/30`
Vậy ...
2. Tìm GTNN:
a) P=3|2x+5|-7 b) Q = |x-3|+|x-5|
c) (2x-3)2 - 14 d) H = (2x-y)2+|x-3|+7
Thực hiện phép tính
a) (2x^4-5x^2+x^3-3-3x):(x^2-3) b) (x^5+x^3+x^2+1):(x^3+1)
c) (2x^3+5x^2-2x+3):(2x^2-x-1) d) (8x-8x^3-10x^2+3x^4-5):(3x^2-2x+1)
Mik cần gấppp
Bài 5: Tìm nghiệm của các đa thức sau: Dạng 1: a) 4x + 9 b) -5x + 6 c) 7 – 2x d) 2x + 5 Dạng 2: a) ( x+ 5 ) ( x – 3) b) ( 2x – 6) ( x – 3) c) ( x – 2) ( 4x + 10 ) Dạng 3: a) x2 -2x b) x2 – 3x c) 3x2 – 4x d) ( 2x- 1)2 Dạng 4: a) x2 – 1 b) x2 – 9 c)– x 2 + 25 d) x2 - 2 e) 4x2 + 5 f) –x 2 – 16 g) - 4x4 – 25 Dạng 5: a) 2x2 – 5x + 3 b) 4x2 + 6x – 1 c) 2x2 + x – 1 d) 3x2 + 2x – 1
A)/x-3/+2
B)/x-3/-2
C)(2x+3)^2
D)(2x+3)^2+1/2
E)/2x-3/<5
G)/3x-5/>4
A=-x+14/4-x
B=5-/2x-1/
a) |x-2|+|x-5|=3
b) |3x-5|+|3x-1|=6
c) 2|x-3|+|2x+5|=11
d) |x+1|+|2x-3|=|3x-2|
e) |x-3|+|5-x|+2|x-4|=2
CẢM ƠN Ạ :)
Bài tập: Rút gọn biểu thức
A=|x-2| + |3-x| +|2x-5|+|10-2x|
B=3|x-3|+2|4-x|+|x|
C=-6|x+1|-3|2x+1|+5|x-1|
D=-|x|+|3x-1|-|4x+1|+|x-9|
E=5|x-7|-2|2x-7|+3|x+5|-4|4-2x|
Tìm nghiệm : a) (2x-3).(2x+3) B)(x-4).(x-1).(x-2) C)2x(3x-1)-3x(5+2x) D)(3x-2).(3x+2)-4.(x-1)
Tìm x biết : a) 2x+3/15 = 7/5. b) x-2/9 = 8/3. c) -8/x = -x/18 d) 2x+3/6 = x-2/5. e) x+1/22 = 6/x f) 2x-1/2 = 5/x g) 2x-1/21 = 3/2x+1 h) 10x+5/6 = 5/x+1
tìm x biết:
a)(2x+2)(2x-2)-4x(x+5)=8
b)(4x+5)(4x-5)-8x(2x-7)=11
c)(1/2x-3)(1/2x+3)-1/4x(x+5)=11/2
d)(3x+2)(3x-2)-4x(x+2-5x2=18
a,|7 - 2x| + 7 = 2x
b,| 1 - x | = 4x + 1
c, | x - 1/3 | + 4/5 = | ( 3,2) + 2/5 |
d,| x - 7 | + 2x + 5 = 6
e, 3x - | 2x - 1 | = 2