1. (x-6)^2 = 2(x-6)
2. 2(x-3)^2 = (x-3)(x+5)
3. 4(x-3)=2x-5(2x+3)
4. x2 +4 -2 (x-1) = (x-2)^2
5. x-3/5 = 6 - 1-2x/3
6. x+2 = 6-5x/2
7. x+2/5 - x+3 = x-2/2
8. 2x-5/x-4 = 2x+1/x+2
9. X+3/x-3 - x-1/x+3 = x2 + 4x + 6/x2 -9
10. 3x-3/x2-9 -1/x-3 = x+1/x+3
11. X+1/x-1 - x-1/x+1 = 4/x2 -1
tìm x 4.(x+1).(-x+2)+(2x-1).(2x+3)=-11 (2x+4).(3x+1).(x-2)-(-3x2 +1).(-2x+2/3)=-26/3
Tìm x, biết :
a) (x+4)2-x2(x+12)=16
c) (x+3)3-x(3x+1)2+(2x+1)(4x2-2x+1)=28
d) (x-2)3-(x+5)(x2-5x+25)-6x2=11
Bài 4. Tìm x, biết:
a) (2x + 1)^2 - 4(x + 2)^2 = 9
b) (x + 3)^2 - (x - 4)( x + 8) = 1
c) 3(x + 2)^2 + (2x - 1)^2 - 7(x + 3)(x - 3) = 36
1) Rút gọn đa thức
a) ( x+8)\(^2\) - 2( x+8) ( x-2) + ( x-2)\(^2\)
b) x(x-4) ( x+4) - ( x\(^2\)+ 1) (x\(^2\)-1)
c) 2(x+3y) ( 2x - 3y) - (2x - 1)\(^2\)+ ( 3y-1)\(^2\)
1) Rút gọn đa thức
a) ( x+8)\(^2\) - 2( x+8) ( x-2) + ( x-2)\(^2\)
b) x(x-4) ( x+4) - ( x\(^2\)+ 1) (x\(^2\)-1)
c) 2(x+3y) ( 2x - 3y) - (2x - 1)\(^2\)+ ( 3y-1)\(^2\)
Rút gọn rồi tính giá trị
c)C= 4(3x-2)2+(4-x)2-(6x-4)(8-2x) với x=149
d) (3x-4)2-9(x-2)(x+2) tại x=-2
e) x(x-3)2-(x-1)(x+5)-x(x-2)(x+2) tại x=-1
Tìm x
a)(2x-1)^3-(2x-1)^3=-8
b)x(x-2)(x+2)-3(2x-1)^2-2x-5=-6x(x+1) c)(x+1)^3-(x-1)^3-6(x-1)^2=-10Tìm x, biết:
a) 16x2-(4x-5)2=15 b) (2x+1)(1-2x)+(1-2x)2=18
c) (x-5)2-x(x-4)=9 d) (x-5)2+(x-4)(1-x)=0