Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}\frac{radicalfactor\left(b\right)}{radicalfactor\left(b\right)}$, dove $a=72$ e $b=\sqrt{72}$

Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=72$, $b=\sqrt{72}$, $c=\sqrt{72}$, $a/b=\frac{72}{\sqrt{72}}$, $f=\sqrt{72}$, $c/f=\frac{\sqrt{72}}{\sqrt{72}}$ e $a/bc/f=\frac{72}{\sqrt{72}}\cdot \frac{\sqrt{72}}{\sqrt{72}}$

Applicare la formula: $\frac{a}{a}$$=1$, dove $a=72$ e $a/a=\frac{72\sqrt{72}}{72}$