ta có (2x-1)^3=2^9
=> (2x-1)^3=512
=> (2x-1)^3=8^3
=> 2x-1=8
=> 2x=9
=>x=9/2
ta có (2x-1)^3=2^9
=> (2x-1)^3=512
=> (2x-1)^3=8^3
=> 2x-1=8
=> 2x=9
=>x=9/2
: 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) /x-1/=2x+1
b) /x-3/=2x-9
c) /x-2/-2x=3
d) /x+1/=/x-3/
tìm x biết
a)(x+5^3)=-64
b)(2x-3^2)=9
C)(1\2)^2x-1=1\8
Tìm x biết:
a) (2x+1)^5= (2x+1)
b) |2-5x|=|x+1|
c) |x-3|+(x^2 -9)^2=0
d) |4x+1| -2x+3=5
Tìm x,y biết:
1) 3^X-1 = 1/243
2) 81^-2X x 27^X=9^5
3) ( x-y+3)^2 + (y-1)^2=0
Cho mình hỏi câu này với, hỏi toán lớp 7:
Tìm x biết:
a)(x-2)^2- (x-3)(x^2+3x+9) + 6(x+1)^2 = 9
b) (x+3)^3 - x(3x+1)^2(2x+1)(4x^2-2x+1)=28
Tìm \(x\), biết :
a) 2(\(3x-2\))-3(\(x-2\))=-1
b) 2(\(3-3x^2\))\(\div3x\)(\(2x-1\))=9
hellp!!☹
Tìm x, biết:
1) |2x-1| = -19- x
8) | 2x-1| =x
9) | 2x+3|= 3x
10) | x+2| = 2x
Tìm x biết
a.|x-2|+|x-3|+|2x-8|=9
b.|x+5|-|1-2x|=x