Question

Упростите выражение:
(√5+1)²+4(√5-2,(5))-6!1-√5!

Answer 1

$(sqrt{5}+1)^2+4(sqrt{5}-2,5)-6!1-sqrt{5!}=\(sqrt{5})^2+2*sqrt{5}*1+1^2+4sqrt{5}-10-(1*2*3*4*5*6)1-\-sqrt{1*2*3*4*5}=\5+sqrt{20}+1+sqrt{80}-10-720-sqrt{120}=\sqrt{20}+sqrt{80}-sqrt{120}-724=2sqrt{5}+4sqrt{5}-2sqrt{30}-724$