1. tìm x biết
a, (2x - 3)\(^2\) = |3 - 2x|
b, (x - 1)\(^2\) + (2x - 1)\(^2\) = 0
c, 5 - x\(^2\) = 1
d, x - 2\(\sqrt{x}\) = 0
g, (x - 1) + \(\dfrac{1}{7}\) = 0
tìm x
a, (2x - 3)\(^2\) = |3 - 2x|
b, (x - 1)\(^2\) + (2x - 1)\(^2\) - 0
c, x - 2\(\sqrt{x}\) = 0
d, (x - 1)\(^2\) + 1/7 = 0
Tìm x
A) 2x(x-5)-x(2x+3)=25
B) (3y^2-y+1)(y-1)+y^2(4-3y)=5/2
C) 2x^2 +3( x-1)( x+1)= 5x(×+1)
Tìm x
X-1/5 = 2x+1/3
X+3/2x-5 = 2/3
2/3 . 3x+1 - 7 . 3x = -405
2x+3 . 5 + 2x+2 . 3 + 2x+1 . 24 = 200
Cho các đa thức :
F(x)=x^3.(3x-1)-x(1+3x^4)
G(x)=x^2(x^2+2)-x(x^4+2x^2+7)+3
H(x)=x^3(-2+2x-x^2)-1/2(5x-3-2x^2)
a) Tính F(x)+G(x)-H(x)=A(x)
F(x)-G(x)-H(x)=B(x)
F(x)+G(x)-2H(x)=C(x)
b) Tìm nghiệm của C(x)
Tim x,y:
|x-4|+3|3x-2|-2|2-x|=x+1
||2x-3|-3/4|=5/6
|1/2-|3-x||=2x-1
|x-2007|+2004|y-2008|\(\le\)0
3|x-2y|+4|y+1/2|=0
Tim x
a, 2(x- 1/3)+3x=7/4
b, x-1/3 == 27/x-1
c, 2x +1/x+3= 2x+3/ x +5
Tick nha!
Tính GTBT :
A = 2x2 - 3 . \(\left|x\right|\) + 1 với \(\left|x\right|\) = 2
B = 2 . \(\left|x-2\right|\) - 3 . \(\left|1-x\right|\) với x = 4
a)1/2x+3/5x=-33/22
b) (2/3x -4/7).(1/2+-3/7:x)=0
c) (4/5-2x).(1/3+3/5:x)=0