Applicare la formula: $ax=b$$\to \frac{ax}{a}=\frac{b}{a}$, dove $a=2$, $b=1$ e $x=\left(y-xp\right)p^2$

Applicare la formula: $\frac{a}{a}$$=1$, dove $a=2$ e $a/a=\frac{2\left(y-xp\right)p^2}{2}$

Applicare la formula: $xa=\frac{b}{c}$$\to x=\frac{b}{ac}$, dove $a=p^2$, $b=1$, $c=2$ e $x=y-xp$

Applicare la formula: $x+a=b$$\to x=b-a$, dove $a=-xp$, $b=\frac{1}{2p^2}$, $x+a=b=y-xp=\frac{1}{2p^2}$, $x=y$ e $x+a=y-xp$

Applicare la formula: $ab$$=ab$, dove $ab=- -1xp$, $a=-1$ e $b=-1$