x3+y3+z3-3xyz
= (x+y)3-3xy(x+y)+z3-3xyz
= [(x+y)3+z3]-[3xy(x+y)+3xyz]
=(x+y+z)[(x+y)2-(x+y).z+z2]-3xy(x+y+z)
=(x+y+z)(x2+y2+z2+2xy-xz-yz) -3xy(x+y+z)
= (x+y+z)(x2+y2+z2-xy-xz-yz)
X^3+Y^3+Z^3-3xyz
phan tich da thuc thanh nhan tu
PHAN TICH DA THUC THANH NHAN TU
B= X^3+Y^3+Z^3-3XYZ
phan tich da thuc thanh nhan tu
x^2+y^2+z^2+3xyz
Phan tich da thuc thanh nhan tu
x^2 + y^2 + z^2 - 3xyz
phan tich da thuc thanh nhan tu
x^2+y^2+z^2+3xyz
phan tich da thuc thanh nhan tu
x3+y3+z3- 3xyz
phan tich da thuc thanh nhan tu (x-y).z^3 +(y-z).x^3 +(z-y).y^3
(x+y+z)^3 - (x+y-z)^3 - (y+z-x)^3 - (z+x-y)^3
Phan tich da thuc thanh nhan tu
Phan tich thanh nhan tu
x^3+y^3+z^3-3xyz
