Question

Прощу помощи!Нужно срочно решить

Answer 1

$frac{b^{1/2}(a^{1/2}-b^{1/2})}{(a^{1/2}-b^{1/2})(a^{1/2}+b^{1/2})}= frac{b^{1/2}}{a^{1/2}+b^{1/2}}$