Question

Решитеее эти 3 задания пожжжжжж!!!!!

Answer 1

1. $2sqrt{5}-sqrt{45}=2sqrt{5}-sqrt{9*5}=2sqrt{5}-3sqrt{5}=-sqrt{5}$

2. $frac{sqrt{8}*sqrt{6}}{sqrt{12}}=sqrt{frac{8*6}{12}}=sqrt{frac{4}{1}}=2$

3. $xysqrt{y} =-sqrt{x^{2}y^{3}}, x<0, y>0$