\(5\left(x-1\right)+2x\left(1-x\right)=0\\ \Leftrightarrow5\left(x-1\right)-2x\left(x-1\right)=0\\ \Leftrightarrow\left(x-1\right)\left(5-2x\right)=0\Leftrightarrow\left[{}\begin{matrix}x-1=0\\5-2x=0\end{matrix}\right.\)
\(\Leftrightarrow\left[{}\begin{matrix}x=1\\x=\dfrac{5}{2}\end{matrix}\right.\)
Vậy x = 1 hoặc x = \(\dfrac{5}{2}\)
Tìm x,y biết :
1 ) | 4 - x | + | 2y +1 | = 0
2) | x - 3 | = | 5 - 2x |
|x-3| + |y-2x | =0
|x| + 3|2x -x ² | =0
|5x ² -5 | + 4|y-7 | =0
||x +1 | + |y-5 |=0
|x ² -1| + |y-1| =0
|x-1 | +|x ²-x |=0
Tìm x biết :
a) | 2x - 1 | = 4
b) -3 | 2x | + | 5 - x | = 1
c) 2^x + 3 = 2^x - 1 = 15/64
d) | -3 + 5 | = x
e) ( x - 1 )^100 + ( x - y )^98 = 0
f) ( x - 7 )^x + 1 - ( x - 7 )^x + 5 = 0
(x+1) (3-2x) >0
(x-3) (6-x) <o
(2x+4) (5-x) >0
Tìm x biết:
a. (x - 2).(x + 3/4) > 0
b. (2x - 5).(1 - 3x) > 0
c. (3 - 2x).(x + 1) < 0
d.(5x + 11).(7 - x) < 0
tìm x biết :
25(x+1)^4-26(x+1)^2+1=0
x^2+(x-1)=0
\(\dfrac{x+1}{100}\) +\(\dfrac{x+2}{999}+.....+\dfrac{x+6}{995}+5=0\)
4x^2-4x-5(2x-1)-5=0
Bài 1 : Tìm x
a) 2/3 - 1/3 (x-3/2)-1/2(2x+1)=5
b) (x+1/2)(X-3/4)=0
c) 1/3 x + 3/5 (x+1)=0
d)x-8/2 > 0
e) x:(2/9 - 1/5 )=1/2
g) 1/3 + 1/2 : x = 1/5
Bài 1 : Tìm x
a) 2/3 - 1/3 (x-3/2)-1/2(2x+1)=5
b) (x+1/2)(X-3/4)=0
c) 1/3 x + 3/5 (x+1)=0
d)x-8/2 > 0
e) x:(2/9 - 1/5 )=1/2
g) 1/3 + 1/2 : x = 1/5
1. Tìm x :
a) ( x - 3 ) . ( 2x + 5 ) > 0
b)( 1 - 4x ) . ( x - 2 ) < 0
c) \(\dfrac{-3}{x+2}< 0\)
b)\(\dfrac{x-3}{2x-1}>0\)
e) \(\dfrac{4x+1}{x+1}\)
