: Giải các phương trình sau:
a)x4 + 5x3 – 12x2 + 5x + 1 = 0
b)(x2 – x + 1)4 + 5x4 = 6x2 ( x2 – x + 1)2
c)( 8x + 7)2( 4x + 3)( x + 1) = 3,5
d)( x2 + 4x+ 2)2 = ( x + 3)4
Bài 1 : tìm x biết
A. 3x2.(2x3-x+5)
B. (4xy+3y-5x).x2+7
C. (3x-2)(4x+5)-6x(2x-1)
D. (3x-5)(x2-5x+7)
Bài 1
a) fx4x+16/x2+6 = fx3/x2+1 + fx5/x2+3 + fx7/x2+5
b)fxx2+2x+7/(x+1)2+2 = x2+2x+4
c)fx5/x2+x-6 - fx2/x2+4x+3 = fx-3/2x-1
Bài 2
a)fx3/1-4x = fx2/4x+1 - fx8+6x/16x2-1
b)fx3/5x-1 + fx2/3-5x = fx4/(1-5x)(5x-3)
c)fxx+2/x+1 + fx3/x-2 = fx3/x2-x-2 + 1
1. (4x-10).(24+5x)=0
2 .(2x-5).(3x-2)=0
3. (2x-1).(3x+1)=0
4. x.(\(x\)2-1)=0
5.(5x+3).(\(x^2\)+4).(x-1)=0
6.(x-1).(x+2).(x+3)=0
7.(x-1).(x+5).(-3x+8)=0
Tìm x, biết:
(4x-1)2-(3x+2)(3x-2)= (7x-1)(x+2)+(2x+1)2-(4x2+7)
(5x-1)(x+1)-2(x-3)2= (x+2)(3x-1)-(x+4)2+(x2-x)
(-x+5)(x-2)+(x-7)(x+7)= (3x+1)2-(3x-2)(3x+2)
(2x+3)2-(5x-4)(5x+4)= (x+5)2-(3x-1)(7x+2)-(x2-1)
(1-3x)2-(x-2)(9x+1)= (3x-4)(3x+4)-9(x+3)2
1.Giải các phương trình sau:
A) 3x - 2 = 2x - 3
B) 2x + 3 = 5x + 9
C) 5 - 2x = 7
D) 10x + 3 - 5x = 4x + 12
E) 11x + 42 - 2x = 100 - 9x - 22
F) 2x - (3 - 5x ) = 4(x+3)
G) x(x+2) = x(x+3)
h) 2(x-3) + 5x(x-1)=5x2
Tìm x
a)(2x+1)2-4(x+2)2 =9
b)(3x-1)2 +2(x+3)2 +11(x+1)(1-x)=6
c)(x+1)3 - x2 (x+3)=2
d)(x-2)3 -x(x+1)(x-1)+6x2 =5
e)(x-3)(x2 +3x +9)-x(x+4)(x-4)=5
g)(x-2)3 -(x+5)(x2 -5x+25)+6x2 =11
Tìm x, biết:
1) 2x (x-3) + 5x - 15 = 0
2) x ( 2x - 7) - 4x + 14 = 0
3) x2 - 12x + 36 = 0
4) (x + 3) (x2 - 3x + 9) - x (x -1)(x + 1) -27 = 0
