I don't understand how sqrt((-sqrt(7)-sqrt(3))^2 + (sqrt(2) - (-sqrt(3)))^2 equals sqrt(15+2sqrt(21) +2sqrt(6) I don't know the steps to get from the first problem to the answer. So If the steps can be explained or demonstrated to me better?
Guest Feb 8, 2012

You forgot one ')', please correct it and ill try to explain ( there are 4 ('s and three )'s)

Ehrlich  Mar 26, 2017

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