Question

вычислите
(1- √5)^2 + √(3-2√5)^2

Answer 1

$(1-\sqrt{5})^2 +\sqrt{(3-2\sqrt{5} )^2} =1-2\sqrt{5}+5+ |3-2\sqrt{5}|= =1-2\sqrt{5}+5+2\sqrt{5}-3=3$