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х-4,7=-12

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Битва на реке синие воды , нужна дата

Напишите сочинение связывая вот эти слова в предложения:
The Sad Story of Prince Hamlet
— Hamlet learns that his father king was murdered by his own brother Claudius 
— A radical change in Hamlet's life
— The notorious murderer becomes king
— Hamlet rebels
— Hamlet knows that to protect his own country
from the evil king is a manly thing to do
— He dedicates his life to revenge
--- Claudius spreads the rumour that Hamlet is mad
— Killing Polonius Hamlet involuntarily becomes a murderer himself
— Now he knows that the die is cast
— Hamlet makes sure that Claudius is guilty
— Hamlet kills Claudius but dies poisoned

Докажите, что при положительных значениях a, b и c выражение [tex]\sqrt{a+b+c+2\sqrt{ac+bc}}+\sqrt{a+b+c-2\sqrt{ac+bc}}[/tex] тождественно равно [tex]2\sqrt{a+b}[/tex], если a+b≥c