xz-yz-x2+2xy-y2
=(xz-yz)-(x2-2xy+y2)
=z(x-y)-(x-y)2
=(x-y)(z-x+y)
xz-yz-x2+2xy-y2
=(xz-yz)-(x2-2xy+y2)
=z(x-y)-(x-y)2
=(x-y)(z-x+y)
Cho x^2+y^2+z^2=10. Tính P= (xy=yz=xz)^2 + (x^2-yz)^2 + (y^2 -xz)^2 + (z^2-xy)^2
x2 – y2 + xz - yz
Phân tích các đa thức sau thành nhân tử:
a/ \(x^2-2xy+y^2-xz+yz\)
b/ \(\left(x+y+z\right)-x^3-y^3-z^3\)
c/ \(x^2-9x+18\)
d/ \(a^4+a^2-1\)
Phân tích các đa thức sau thành nhân tử tổng hợp :
a, 5y^3 - 10xy^2 + 5yx^2 - 20y
b, x^2 + 2xy + y^2 - xz - yz
c, 9x^2 + y^2 + 6xy
d, 8 -12x + 6x^2 - x^3
e, 125x^3 - 75x^2 + 15x - 1
Giúp mình với ạ mình đang cần gấp
\(x^2+y^2+z^2-xy-yz-xz\)
1). x2y2(y-x)+y2z2(z-y)-z2x2(z-x)
2)xyz-(xy+yz+xz)+(x+y+z)-1
3)yz(y+z)+xz(z-x)-xy(x+y)
4)2a2b+4ab2-a2c+ac2-4b2c+2bc2-4abc
5)y(x-2z)2+8xyz+x(y-2z)2-2z(x+y)2
6)8x3(y+z)-y3(z+2x)-z3(2x-y)
7) (x2+y2)3+(z2-x2)3-(y2+z2)3
1). x2y2(y-x)+y2z2(z-y)-z2x2(z-x)
2)xyz-(xy+yz+xz)+(x+y+z)-1
3)yz(y+z)+xz(z-x)-xy(x+y)
4)2a2b+4ab2-a2c+ac2-4b2c+2bc2-4abc
5)y(x-2z)2+8xyz+x(y-2z)2-2z(x+y)2
6)8x3(y+z)-y3(z+2x)-z3(2x-y)
7) (x2+y2)3+(z2-x2)3-(y2+z2)3
(x2+y2+z2)*(x+y+z)2+(xy+yz+xz)2
A.5x^2y^3-25x^3y^4+10x^3y^3
B.12x^2y-18xy^2-30y^2
C.5(x-y)-y(x-y)
D.y(x-z)+7(z-x)
E.27x^2(y-1)-9x^3(1-y)
F.36-12x+x^2
G.x^2+2xy+y^2-xz-yz
H.x^4+64
I.27x^2(y-1)-9x^3(1-y)
K.36-12x+x^2
M.-4x^2+4x-1
N.x^2+5x+6
P.x^2-x-6
Q.x^4-5x^2+4