|2x - 1| = |2x + 3|
=> 2x - 1 = 2x + 3 hoặc 2x - 1 = -(2x + 3)
+) 2x - 1 = 2x + 3
=> -1 - 3 = 2x - 2x
=> -4 = 0 (vô lý)
+) 2x - 1 = -(2x + 3)
=> 2x + 1 = -2x - 3
=> 2x + 2x = -3 - 1
=> 4x = -4
=> x = -1
Vậy x = -1
Tìm x, biết
a)(2x-1)^5-(2x-1)^8=0
b)(2x+1). (2x-3)<0
c)(x-1). (2x+3)>0
\(\dfrac{x-3}{3}=\dfrac{2x+1}{5}\)
\(\dfrac{x+1}{22}=\dfrac{6}{x}\)
\(\dfrac{2x-1}{2}=\dfrac{5}{x}\)
\(\dfrac{2x-1}{21}=\dfrac{3}{2x+1}\)
\(\dfrac{2x+1}{9}=\dfrac{5}{x+1}\)
Tìm x
biết f(x)=x^2+2x+3/5 2x^3+3 ; g(x) = -2x^2-1/2x^3 -3x +6
tìm h(x) = 2f(x) - 1/2g(x)
: 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 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 b)(x-1)(3-2x)+(2x-1)(x+3)=4
Bài 2 Tìm x biết 1, (2x-2).(3x+1)-(3x-2).(2x-3)=5 2,(1-3x).(3x-5)-(2x-4)(2-3x)=x-6 3,(2x-1).(4x^2+2x+1)-(2x+1)(4x^2-2x+1)=5x+6 Giúp tớ với
Tìm x, biết : 2x-3+3.|x-1|=4x+1
3.5^(-2x)+4/5^(2x)=4375
1. Tìm x :
5^x+2 + 5^x+1 +5^x = 3^2x + 3^2x+1 + 3^2x+3
1. Tìm x :
5^x+2 + 5^x+1 +5^x = 3^2x + 3^2x+1 + 3^2x+3
