expand and simplify (7+root 6)²
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- (7 + √6)²
By identity , (a + b)² = a² + b² + 2ab
= 7² + √6² + 2 × 7 × 6
(√6² = √36 = √6 × √6 = 6)
= 49 + 6 + 84
= 139
Hope it helps
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