Applicare la formula: $ax+by$$=\left(\frac{a}{mcd\left(a,b\right)}x+\frac{b}{mcd\left(a,b\right)}y\right)mcd\left(a,b\right)$, dove $a=6$, $b=-16$, $ax+by=6x^4-16x^3+9x^2-6x-48$, $ax=6x^4$, $by=-16x^3$, $x=x^4$ e $y=x^3$

Applicare la formula: $x\left(a+b\right)$$=xa+xb$, dove $a=x^4$, $b=-\frac{8}{3}x^3$, $x=2$ e $a+b=x^4-\frac{8}{3}x^3$