Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}\frac{radicalfactor\left(b\right)}{radicalfactor\left(b\right)}$, dove $a=1$ e $b=\sqrt{1+\frac{-v^2}{c^2}}$

Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=1$, $b=\sqrt{1+\frac{-v^2}{c^2}}$, $c=\sqrt{1+\frac{-v^2}{c^2}}$, $a/b=\frac{1}{\sqrt{1+\frac{-v^2}{c^2}}}$, $f=\sqrt{1+\frac{-v^2}{c^2}}$, $c/f=\frac{\sqrt{1+\frac{-v^2}{c^2}}}{\sqrt{1+\frac{-v^2}{c^2}}}$ e $a/bc/f=\frac{1}{\sqrt{1+\frac{-v^2}{c^2}}}\frac{\sqrt{1+\frac{-v^2}{c^2}}}{\sqrt{1+\frac{-v^2}{c^2}}}$

Applicare la formula: $x\cdot x$$=x^2$, dove $x=\sqrt{1+\frac{-v^2}{c^2}}$

Applicare la formula: $\left(x^a\right)^b$$=x$, dove $a=\frac{1}{2}$, $b=2$, $x^a^b=\left(\sqrt{1+\frac{-v^2}{c^2}}\right)^2$, $x=1+\frac{-v^2}{c^2}$ e $x^a=\sqrt{1+\frac{-v^2}{c^2}}$