\(A=12x\left(x-4\right)-\left(x+1\right)\left(x^2-x+1\right)+\left(x-4\right)^3\)
\(=12x^2-48x-x^3-1+x^3-12x^2+48x-64\)
\(=-65\)
\(B=\left(x-3\right)\left(x+1\right)-\left(x+5\right)^2\)
\(=x^2-2x-3-x^2-10x-25\)
\(=-12x-28\)
=>-12x-28=-65
=>12x+28=65
=>12x=37
hay x=37/12
1 .[(x+)^5-2(x+y)^4]:[-5(x+y)^3]
2.phân tích đa thức thành nt
a,12x^3-12x^2+3x
b,x^2(x-1)+9(1-x)
c,8(x-y)-x^3(x-y)
3.tìm x
x^2+1/4=x
phan tich da thuc thanh nhan tu:
a,x^4-2x^3-12x^2+12x+36
b,x^4+x^3+6x^2+5x+5
c,x^8y^8+x^4y^4+1
d,x^5-x^4+x^3-X^2+x-1
e,x^5+x^4-X63+x62-x+2
g,x(Y^2-z^2)+y(z^2-x^2)+z(x^2-y^2)
Bài 1: Tìm x
a) (x-1)^3+3(x+1)^2=(x^2-2x+4)(x+2)
b) x^2-4=8(x-2)
c) x^2-4x+4=9(x-2)
d) 4x^2-12x+9=(5-x)^2
Bài 1:Rút gọn biểu thức
a.(x-2)(2x-1)-(2x-3)(x-1)-2
b. x(x+3y+1) -2y (x-1) - (y+x+1)x
Bài 2: Tìm x
a. (14x^3 + 12x^2 -14x) :2x = (x+2) (3x-4)
b. (4x - 5) (6x+1) - (8x+3) (3x-4) =15
D=16x^2(x+1)(x+2)(x+3)-9
E= (4x+1)(12x+1)(3x+2)(x+1)-4
K= 64x^4=81
L= x^5+x=1
P= x^2+2xy+y^2+2x+2y-3
N= (x-1)(x-3)(x-4)(x-6)-72
phân tích đa thức thành nhân tử
1)ab(a+b)-2bc(b-2c)-2ca(a-2c)-4abc
2)a^2b+2ab^2+4b^2c+4bc^2+2c^2a+ca^2+4abc
3)(x^2-6x+5)(x^2-10x+21)-20
4)4(x^2+x+1)^2+5x(x^2+x+1)+x^2
5)x^4+5x^3-12x^2+5x+1
6)(x+1)(x-4)(x+2)(x-8)+4x^2
7)4x^3+5x^2+10x-12
8)(x+3)^2(3x+8)(3x+10)-8
9)(4x+1)(12x-1)(3x+2)(x+1)-4
Giải pt bậc bốn sau
2x^4-x^3-9x^2+13x-5=0
x^4-2x^3-11x^2+12x+36=0
x^4-12x^3+x^2+x+1=0
Tìm X:
a) x.(2x+1) - x^2(x+2) + (x^3-x+3) = 3
b) 4.(x-6) - x^2(2+3x) + x(5x-4) + 3x(x-1) = 12x+12
c) (3x+1).(x-2) = (2-x) ( -3x-5)
d) (x+3).(x+5) - x.(x+7) = 2x+8
GIÚP MÌNH VỚI Ạ!!!
Bài 1: Làm tính nhân
a) -3x^2 . ( 2x^3 - 2x + 1/3 )
b) ( x^4 + 2x^3 - 2/3 ) . ( -3x^4 )
c) ( x + 3 ) . ( x - 4 )
d) ( x - 4 ) . ( x^2 + 4x + 16 )
e) 4. ( x - 1/2 ) . ( x + 1/2 ) . ( 4x^2 + 1 )
Bài 2: Tìm x, biết
a) ( 2 - x ) . (x^2 + 2x + 4 ) + x . ( x - 3 ) . ( x + 4 ) - x^2 + 24 = 0
b) (x/2 + 3 ) . ( 5 - 6x ) + ( 12x - 2 ) . ( x/4 + 3 ) = 0
Bài 1: Làm tính nhân
a) -3x^2 . ( 2x^3 - 2x + 1/3 )
b) ( x^4 + 2x^3 - 2/3 ) . ( -3x^4 )
c) ( x + 3 ) . ( x - 4 )
d) ( x - 4 ) . ( x^2 + 4x + 16 )
e) 4. ( x - 1/2 ) . ( x + 1/2 ) . ( 4x^2 + 1 )
Bài 2: Tìm x, biết
a) ( 2 - x ) . (x^2 + 2x + 4 ) + x . ( x - 3 ) . ( x + 4 ) - x^2 + 24 = 0
b) (x/2 + 3 ) . ( 5 - 6x ) + ( 12x - 2 ) . ( x/4 + 3 ) = 0
