How to find positive Square root of (√7+2√12)

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how to find positive Square root of (√7+2√12) . and application of formula
(a+b)²= a²+b²+2ab to find positive Square root of surds and indices.
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√(7+2√12) = √a + √b, a + b = ?

sorry, if out of the topic

ahfamu
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What happened to the 2ab part of the equation?

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