(x^3-3x^2.2+3x.2^2-2^3)-2x-2=(1^3-3.1^2x+3.1.x^2-x^3)-5x^2-10x
x^3-6x^2+12x-8-2x-2=1-3x+3x^2-x^3-5x^2-10x
chuyển vế,ta được:
2x^3+4x^2+23x-11=0
phần này dễ, ban tự giải và **** cho mk nha!!!!!!!!!!!!!
1. Rút Gọn
a) -5x (x-3).(2x+4)-(x+3)(x-3)+(5x-2)(3x+4)
b) (4x-1)x(3x+1)-5x^2x(x-3)-(x-4)x(x-5)-7(x^3-2x^2+x-1)
c) (5x-7)(x-9)-(3-x)(2-5x)-2x(x-4)
d)(5x-4)(x+5)-(x+1)(x^2-6)-5x+19
e)(9x^2-5)(x-3)-3x^2(3x+9)-(x-5)(x+4)-9x^3
g) (x-1)^2 - (x+2)^2
Thanks mn nhiều ạ
tìm x, biết:
a) x2-2x+1=25
b) (5x+1)2-(5x-3)(5x+3)=30
c) (x-1)(x2+x+1)-x(x+2)(x-2)=5
d) (x-2)3-(x-3)(x2+3x+9)+6(x+1)2=15
tìm x biết:
a) x2-2x+1=25
b) (5x+1)2-(5x-3)(5x+3)=30
c) (x-1)(x2+x+1)-x(x+2)(x-2)=5
d) (x-2)3-(x-3)(x2+3x+9)+6(x+1)2=15
2x ^3 -5x^2+4x-1) : (2x+1)
(x63 -2x+4) ; (x+2)
(6x^3 - 19x^2+23x-12):(2x-3)
(x^4 - 2 x ^3 - 1+ 2 x ):(x^2 - 1)
(6x^3 - 5x^2 + 4x -1 ) : (2x^2-x+1)
(x^4 -5x^2+4):(x^2-3x+2)
1) (3x-2)/3-2=(4x+1)/42) (x-3)/4+(2x-1)/3=(2-x)/63) 1/2 (x+1)+1/4 (x+3)=3-1/3 (x+2)4) (x+4)/5-x+4=x/3-(x-2)/25) (4-5x)/6=2(-x+1)/2 6) (-(x-3))/2-2=5(x+2)/4 7)2(2x+1)/5-(6+x)/3=(5-4x)/158) (7-3x)/2-(5+x)/5=1 9)(x-1)/2+3(x+1)/8=(11-5x)/310)(3+5x)/5-3=(9x-3)/4
Tính (rút gọn )
(x-10)^2-2(x-10)(5x-3)+(5x+3)
(x-2)^3-x(x-3)^2
(x-2)(x^2+2x+4)-x(x+1)(x-1)
(x+3)(x^2-3x+9)-x(x^2-1)
a, (3x+2)2 - (3x-2)2 =5x+38 b, 3(x-2)2 +9(x-1) =3(x2+x-3)
c, (x+3)3 -(x-3)2 -(x-3)2 =6x+18 d, (x-1)3-x(x+1)2=5x(2-x)-11(x+2)
e, (x+1)(x2-x+1)-2x=x(x-1)(x+1) f, (x-2)3+(3x-1)(3x+1)=(x+1)3
1. Tìm x, biết:
a, (x-2)^2-(x+3)^2-4(x+1)=5
b, (2x-3)(2x+3)-(x-1)^2-3x(x-5)=-44
c. (5x+1)^2-(5x+3)(5x-3)=30
d. (x+3)^2+(x-2)(x+2)-2(x-2)^2=7
tìm x ,biết
a, x^2 -4x =12
b, ( 5x+1)^2 - (5x -3)(5x+3)=30
c, (x-1) ( x^2 +x +1 ) + x(x +2) (2-x)=5
d, 5x(x-3)^2 -5 (x-1)^3 +15 (x+4) (x-4) =5
1) 2x – (3 – 5x) = 4( x +3)
2) 5(2x-3) - 4(5x-7) =19 - 2(x+11)
3) 5x - 4(6-x)(x + 3) = (4-2x)(3-2x) + 2
4) (x - 1)3 - (3x + 2)(-12) = (x2 + 1)(x - 2) - x2
5) (3x -1)2 - (x +3)(2x-1) = 7(x + 1)(x -2) -3x
mn giúp mình vs
