Applicare la formula: $\frac{a}{b}$$=\frac{a}{b}\frac{radicalfactor\left(b\right)}{radicalfactor\left(b\right)}$, dove $a=1$ e $b=x^2\sqrt{49-x^2}$

Applicare la formula: $\frac{a}{b}\frac{c}{f}$$=\frac{ac}{bf}$, dove $a=1$, $b=x^2\sqrt{49-x^2}$, $c=\sqrt{49-x^2}$, $a/b=\frac{1}{x^2\sqrt{49-x^2}}$, $f=\sqrt{49-x^2}$, $c/f=\frac{\sqrt{49-x^2}}{\sqrt{49-x^2}}$ e $a/bc/f=\frac{1}{x^2\sqrt{49-x^2}}\frac{\sqrt{49-x^2}}{\sqrt{49-x^2}}$

Applicare la formula: $x\cdot x$$=x^2$, dove $x=\sqrt{49-x^2}$

Applicare la formula: $\left(x^a\right)^b$$=x$, dove $a=\frac{1}{2}$, $b=2$, $x^a^b=\left(\sqrt{49-x^2}\right)^2$, $x=49-x^2$ e $x^a=\sqrt{49-x^2}$