Rumus-Rumus Aljabar

Rumus-Rumus Aljabar

 $x^3+y^3=\left(x+y\right)^3-3xy\left(x+y\right)$  

 $x^3+y^3=\left(x+y\right)^3-3xy\left(x+y\right)$  

 $x^2+y^2+z^2=\left(x+y+z\right)^2-2\left(xy+yz+xz\right)$ 

 $x^3+y^3+z^3=\left(x+y+z\right)\left(x^2+y^2+z^2-xy-yz-xz\right)+3xyz$ 

 $x^3+y^3+z^3=3xyz$ 

Jika  $x+y+z=0$