a)(x - 2).(x^2 +1)=0
\(\Rightarrow\orbr{\begin{cases}x-2=0\\x^2+1=0\end{cases}}\Rightarrow\orbr{\begin{cases}x=2\\x^2=-1\end{cases}\Rightarrow\orbr{\begin{cases}x=2\\\text{vô lí}\end{cases}}}\)
vậy x=2
b)(x^3+8).(2x^2-8)=0
\(\Rightarrow\orbr{\begin{cases}x^3+8=0\\2x^2-8=0\end{cases}\Rightarrow\orbr{\begin{cases}x^3=-8\\2x^2=8\end{cases}\Rightarrow}\orbr{\begin{cases}x=-2\\x^2=4\end{cases}\Rightarrow}\orbr{\begin{cases}x=-2\\x=\pm2\end{cases}}}\)
vậy \(x\in\left\{\pm2\right\}\)
Tìm x
a.2x+(1+2+3+4+...+100) = 15150
b.(x+1)+(x+2)+(x+3)+(x+4)+(x+5)+(x+6)+(x+7)+(x+8)=36
c.0+0+4+6+8+...+2x=110
1.Tìm số nguyên x biết
|x-3|=|x+7|
|3x+2|+|x-8|
|x+3|+|y-8|=0
|x-5|+|x-3|=0
(x-2)(x+6)=0
x(3x+6)=0
(2x-4)(x3-1)=0
(x-2)(x+7)>0
(x+3)(x+5)>0
(x+2)(x-5)<0
Tìm x biết
a,3/1/2x -5=0
b,3×(x-2)+5/3/4=0
c,1/2x-3-2=0
d, 1/3x+1=2x-3/2
e,(x)-3=5/1/2
g,(x-5)(x+1/2)=0
H,(2x-1/2)=4
i,(4+x3)=8
Tìm STN x, biết
1) (x + 2) - 2 = 0 2) (x + 3) + 1 = 7
3) (3x - 4) + 4 = 12 4) (5x + 4) - 1 = 13
5) (4x - 8) - 3 = 5 6) 3 + (x - 5) = 7
7) 8 - (2x - 4) = 2 8) 7 + (5x + 2) = 14
9) 5 - (3x - 11) = 1 10) 16 - (8x + 2) = 6
Tìm x€ Z , biết:
A/ (2x+10)( x^2 -9)=0
B/ ( x+3)( x-4)<0
C/ ( x+5)(8- x)>0
D/ (|x-5| +1)(|x+1| -2)=0
Tìm x
(2x-7)+17=6
12-2.(3-3x)=-2
-14+3.(-x+5)=-20
-90:5.(-3-2x)=6
(x+1).(x-3)=0
(2x-2).(x+4)=0
(22+4).(x+3)=0
(5-x).(6-2x)=0
3.(x+1)+5=x+8
-4.(2x+9)-(-8x+3)-(x+13)=0
Bài 1 : Tìm số nguyên x , biết :
a, x . ( x + 7 ) = 0
b, ( 2 + 2x ) . ( 7 - x ) = 0
c, x^3 - 4x = 0
d, ( x^2 - 9 ) . ( 3x + 15 ) = 0
e, ( 4x - 8 ) . ( x^2 + 1 ) = 0
Tìm X
(X -1/2 )^2=0
(x -2)^2 =1
(2X +3)^2=9/121
2X ^10 =25 X^8
Tìm x:
a) 2 3/4 - x=3/4
b) x:5/6=-3/5
c)1 1/3 +2/3:x=1
d) x-1/9=8/3
e) 1/2 x + 650%x-x= -6
g) 2(x - 1/2) + 3(-1+x/3)=x(2/x - 1) (x khác 0)
h) x-2/20= -5/2-x
i) (x/2-1)3 + 2=-11/8
k) (x/3 +1/2) (75% - 1 1/2x)=0
GIÚP MÌNH VỚI Ạ. CẢM ƠN MỌI NGƯỜI!
