sprowadź do najprostszej postaci √125+√20-√45/-√20

(√125+√20-√45)/(-√20) = =(√(25*5)+√(4*5)-√9*5)/(-√4*5) = =(5√2+2√5-3√5)/(-2√5) = 4√5/(-2√5) =-2

[latex]dfrac{sqrt{125}+sqrt{20}-sqrt{45}}{-sqrt{20}}=dfrac{-sqrt{125}-sqrt{20}+sqrt{45}}{sqrt{20}}=\ =dfrac{-5sqrt{5}-2sqrt{5}+3sqrt{5}}{2sqrt{5}}=dfrac{-4sqrt{5}}{2sqrt{5}}=oxed{-2}[/latex]