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Please help me!!! I don't understand how to solve it(((

Please help me!!! I don't understand how to solve it(((-example-1

1 Answer

2 votes

\sqrt{( \sqrt{7-2 √(10) }+ √(2) )*2 √(5) }= \\ = \sqrt{( \sqrt{2-2 √(2*5)+5 }+ √(2) )*2 √(5) }= \\ \sqrt{( \sqrt{( √(2)- √(5))^(2) }+ √(2) )*2 √(5) }= \\ \sqrt{( √(5)- √(2) + √(2) )*2 √(5) }= \\ \sqrt{ √(5) *2 √(5) }= \\ √(2*5) = √(10)
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