a) x^2 = 9
x^2 = 3^2
x = 3
b) 3^x = 9
3^x = 3^2
x = 2.
a) X2 = 9
x2 = 32
x = 3
b) 3x = 9
3x = 32
x = 2
a) x2 = 9
x2 = 32
x = 3
b) 3x = 9
3x = 32
x = 2
a) x^2 = 9
x^2 = 3^2
x = 3
b) 3^x = 9
3^x = 3^2
x = 2.
a) X2 = 9
x2 = 32
x = 3
b) 3x = 9
3x = 32
x = 2
a) x2 = 9
x2 = 32
x = 3
b) 3x = 9
3x = 32
x = 2
(x2 + 9) (9x2 -1) = 0
(4x2 -9) (2x-1 -1) =0
( 3x+2) (9-x2 ) =0
(3x+3)2 ( 4x - 42 ) =0
2(x-5) ( x+2) =1
Tìm x nguyên để các biểu thức sau nguyên
a) 4x+ 2
______
5x + 1
b) x2 + 3x +9
_________
x + 3
c) x2 + 9
_____
x + 2
a)x2=x3
b)3x-1=27
c)3x+1=9
(9−x2)(3x−6)=0
tim X
z(3x – 9). (121 – x2) = 0
(9−x2)(3x−6)=0
giúp tớ với
a) (x-1).(x+2)=0
b) (x+4).(4-x)=0
c) (x+4)(-3x+9)=0
d) (2x-4)(x+3)=0
e) (x2-9).(2x+10)=0
g) (4-x).x2=0
Bài 4. Tìm số nguyên x, biết:
a) (x2 −9)(5x+15) =0 |
|
| b) x2 – 8x= 0 |
c) 5+12.(x−1)2 = 53 |
|
| d) (x− 5)2 = 36 |
e) (3x+−5)3 = 64 |
|
| f) 42x + 24x+3 = 144 |
Tìm X
e) – 40 – (– 3 – 33) + (40 – x) = – (– 47) f) x(3x – 9). (121 – x2) = 0
g) – 62 – (38 + x) + 2x = – 100 h) (x + 1)2.(x2 + 1) = 0
i) (x – 12) – (2x + 31) = 6 k) 17/ (x + 3)3 : 3 – 1 = – 10
Tìm X
e) – 40 – (– 3 – 33) + (40 – x) = – (– 47) f) x(3x – 9). (121 – x2) = 0
g) – 62 – (38 + x) + 2x = – 100 h) (x + 1)2.(x2 + 1) = 0
i) (x – 12) – (2x + 31) = 6 k) 17/ (x + 3)3 : 3 – 1 = – 10