Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}\frac{radicalfactor\left(b\right)}{radicalfactor\left(b\right)}$, dove $a=x$ e $b=\sqrt{5-4x-x^2}$

Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=x$, $b=\sqrt{5-4x-x^2}$, $c=\sqrt{5-4x-x^2}$, $a/b=\frac{x}{\sqrt{5-4x-x^2}}$, $f=\sqrt{5-4x-x^2}$, $c/f=\frac{\sqrt{5-4x-x^2}}{\sqrt{5-4x-x^2}}$ e $a/bc/f=\frac{x}{\sqrt{5-4x-x^2}}\frac{\sqrt{5-4x-x^2}}{\sqrt{5-4x-x^2}}$

Applicare la formula: $x\cdot x$$=x^2$, dove $x=\sqrt{5-4x-x^2}$

Applicare la formula: $\left(x^a\right)^b$$=x$, dove $a=\frac{1}{2}$, $b=2$, $x^a^b=\left(\sqrt{5-4x-x^2}\right)^2$, $x=5-4x-x^2$ e $x^a=\sqrt{5-4x-x^2}$