\(x^3-3x^2+3x-1\\ =x^3-3\cdot x^2\cdot1+3\cdot x\cdot1^2-1^3\\ =\left(x-1\right)^3\)
\(x^3-3x^2+3x-1\)
\(=x^3-3.x^2.1+3.x.1^2-1^3\)
\(=\left(x-1\right)^3\)
ĐẶT NHÂN TỬ CHUNG
a) 3x-6 d) 2x(x-3)+7(x-3)
b) 2x+10 e) 3x(x-1)+2(x-1)
c) x\(^2\)-3x f) x\(^2\)(x+2)-5x(x+2)
tìm x : a) (x + 1)^3 + (3 - 2)^3 = 2x^3 + 2(2x - 1)^2 - 9
b) (3x^3+24) : (x+2) + (2x^3−54) : (x^2+3x+9) = 6
x2 - 1 -2xy +2y
( x + 3 )2 - ( 2x - 5 ) x ( x + 3 )
( 3x + 2 )2 + ( 3x -2 )2 -2 ( 9x2 - 4 )
x^3-3x^2+3x-1
(x+y)^2-4x^2
Tìm x biết:
a) (3x + 5)2 - 4x2 = 0
b) 25x4 - (4x - 3)2 = 0
c) (3x + 7)2 - (2x - 3)2 = 0
d) (4x - 1)2 - (5 - 3x)2 = 0
tim x
(2x-3)(x+1)+(2x-3)(3x-7)=0
(x-4)(3x-2)+x^2-16=0
Phân tích thành nhân tử:
a) x.(3x - 2) - 3x + 2
b) 3.(x-y) - 2x + 2y
c) x.(2x - 1) - 6x + 3
a.(x+1)^2-25
b. 1-4x^2
c. 8-27x^3
d. 27+27x+9x^2+x^3
e. 8x^3-12x^2y+6xy^2-y^3
f. x^3+8y^3
g. x^5-3X^4+3x^3-x^2
phân tích đa thức sau thành nhân tử
a\(12x^3y-24x^2y^2+12xy^3\)
b\(x^2-6x+xy-6y\)
c\(2x^2+2xy-x-y\)
d\(ax-2x-a^2+2a\)
e\(x^3-3x^2+3x-1\)
f\(3x^2-3y^2-12x-12y\)
