задание прикреплено)))))))))))))))))) 2 примера...

$\frac{a-16a^{0,5}}{5a^{0,25}+20}=\frac{a^{0,5}(a^{0,5}-16)}{5(a^{0,25}+4)}=\frac{a^{0,5}((a^{0,25})^2-4^2)}{5(a^{0,25}+4)}=\frac{a^{0,5}(a^{0,25}-4)(a^{0,25}+4)}{5(a^{0,25}+4)}= \\ =\frac{1}{5}a^{0,5}(a^{0,25}-4)$

$\frac{x^{\frac{4}{3}}y+xy^{\frac{4}{3}}}{\sqrt[3]{x}+\sqrt[3]{y}}=\frac{xy(x^{\frac{1}{3}}+y^{\frac{1}{3}})}{\sqrt[3]{x}+\sqrt[3]{y}}=\frac{xy(\sqrt[3]{x}+\sqrt[3]{y})}{\sqrt[3]{x}+\sqrt[3]{y}}=xy$