Question

(√11+7)(√11-7) o que obteemos

Answer 1

Olá

$\LARGE{}( \sqrt{11} + 7) \times ( \sqrt{11} - 7) \\ \\ \LARGE{} \sqrt{11} ^{2} - {7}^{2} \\ \\\LARGE{}11 - 49 \\ \\ \LARGE{} - (49 - 11) \\ \\ \LARGE\boxed{ - 38}$

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