Question

$(5 - \sqrt{11}) (5 + \sqrt{11)}$
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Answer 1

Answer:

14

explanation:

$(5 - \sqrt{11}) (5 + \sqrt{11)}$

Using property

$(a + b)(a - b) = {a}^{2} - {b}^{2}$

$(5 - \sqrt{11}) (5 + \sqrt{11)} = {5}^{2} - {( \sqrt{11} )}^{2}$

$\implies \: 25 - 11$

$\implies \: 14$