1, Tìm x
a,3x.(2x+3)-(2x+5).(3x-2)=8
b,5x(x+2)-x.(2x-7)-3x^2=81
Tìm x
(15x-5) (4x-1) + (3x-7) (1-16x) =81
(2x+4) (x-4) +(x-5) (x-2) =3x+5 (x-4)
(8x-3) (3x+2) - (4x+7) (x+4) = (x+1) (5x-1)
a, 3-3/2.(2x-1)-1/2.(3x+2)=2x-3
b, 7/2+1/2.(4x-3/2)-1/3.(3-6x)=1/2.(x-1)
c, 3/2.(2x-1/2)-7/2.(3x+1/3)-1/2.(2x-1)=3x+5
BT6:
A) (5x+1)^2=16/25
B) ( x - 1/3)^3=(2/3)^6
C)(8x - 1)^4=(2x+7)^4
D) (x -1)^5 =(2x-3)^5
E) ( x +1 )^8=(x+1)^10
G) (21-3)^4+(x+5)^6=0
H) 3x -4 = 81^3
Bài 1 :
A ) 5/9 : ( 1/11 +5/22) +5/9:(1/15-2/3)
Bài 2 :
A) 1/2x +7/6=9/5x-4/3
B)81/3(2x+1) = 3
C)64/4(x+1) = 4
D)(1-2/3x)2 = 3
bài 1
a,|3/2+3x|- 1/2=7/3
b,|3x+1|=|-2x-3/2
c,|4x-3|-7/2=3x+1/2
d,|x-1|+|x-3|=2x-1
a) (2x-1)^3=27
b) (2x-1)^4=81
c) (x-2)^5=-32
d) (3x-1)^4=(3x-1)^6
đ) 5^x +5^x+2=650
g) 3^x-1 +5.3^x-1=162
(3/5)mũ 5 . x = (3/7)mũ 7
(-1/3)mũ 3 . x = 1/81
(x - 1/2) mũ 3 = 1/27
(3x + 1)mũ 3 = -27
(x + 1/2) mũ 4 = 16/81
(4/5) mũ 5.x = (4/5) mũ 7
Bài : Rút gọn
1) (3x - 5).(7-5x)-(5x+2).(2-3x)
2) (3x2+5x-2).(2x2-4x+3)
3) (3x2+5x-2).(2x2-4x+3)
4)4(2x3+x)-(2x-1)(4x2+3x+1)
5) 2x(x+3)-(x-5).(7+2x)
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