Question

Calculati : -2,5radical din 32 : radical din 8 - radical din 45 : (-radical din 5)

Answer 1

   
[tex]\displaystyle - \frac{2,5 \sqrt{32} }{ \sqrt{8} } - \frac{ \sqrt{45} }{- \sqrt{5} } = - \frac{2,5\times4 \sqrt{2} }{ 2\sqrt{2} } + \frac{ 3\sqrt{5} }{\sqrt{5} } = \\ \\ = -\frac{2,5\times4 }{ 2} +3 = -2,5\times 2 +3= -5 +3=\boxed{-2}[/tex]