\(A=\dfrac{2\left(x-1\right)+5}{x-1}\left(x\ne1\right)=2+\dfrac{5}{x-1}\in Z\\ \Leftrightarrow x-1\inƯ\left(5\right)=\left\{-5;-1;1;5\right\}\\ \Leftrightarrow x\in\left\{-4;0;2;6\right\}\left(tm\right)\)
: Tìm x, biết:
a) 3x( 4x- 1) - 2x(6x- 3 )=30 b) 2x(3-2x) + 2x(2x-1)=15
c) (5x-2)(4x-1) + (10x +3)(2x - 1)=1 d) (x+2) (x+2)- (x -3)(x+1) = 9
e) (4x+1)(6x-3) = 7 + (3x – 2)(8x + 9) g) (10x+2)(4x- 1)- (8x -3)(5x+2) =14
Tìm x, biết
a)(2x-1)^5-(2x-1)^8=0
b)(2x+1). (2x-3)<0
c)(x-1). (2x+3)>0
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
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)
a, | 5x - 1 | - x = 2x + 3
b, |2x + 1 | + | x - 3 | + | 2x + 3 | = x - 5
c, 2 xy - 3y + 2x + 10 = 0
tìm x biết
a,|x-5|+|3+x|=1
b,|x-3|+x=2
c,|2x+1|=|1-x|
d,|2x-1|+|3-2x|=2
tìm x biết
a) /x-1/=2x+1
b) /x-3/=2x-9
c) /x-2/-2x=3
d) /x+1/=/x-3/
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|
\(A\left(x\right)=2x^3+4x^2-x-1\)
-
\(B\left(x\right)=2x^3-2x^2-x-3\)
=?
tìm x ;
a , | x | + | x + 2 | = 3
b , | 2x + 1 | + | x + 8 | = 4x
c, | 3x + 5 | + | 3 - 3x | = 2x - 1
d , | 2x - 1 | - | 3x - 3 | = 2x - 5 +( x - 2)
e , | 3x - 1 | + | x - 2 | = 2x + 3
