Question

Задание во вложении решите, пожалуйста

Answer 1

 
 $(frac{4}{b-4sqrt{b}} - frac{sqrt[2]{b^3}}{b^2-16b} )*frac{sqrt{b}+4}{4sqrt{b}+16-b} = \ frac{4(b+4sqrt{b})-sqrt[2]{b^3}}{b^2-16b} * frac{sqrt{b}+4}{4sqrt{b}+16-b} =\ frac{4b+16sqrt{b}-sqrt[2]{b^3}}{b^2-16b} * frac{sqrt{b}+4}{4sqrt{b}+16-b} =\ frac{sqrt{b}(4sqrt{b}+16-b)}{4sqrt{b}+16-b} * frac{sqrt{b}+4}{b^2-16b} = \ frac{ b+4sqrt{b} }{b^2-16b} = frac{ 1 } { b - 4sqrt{b}}$