Question

(2-root2)(2+root2) examine​

Answer 1

Answer:

(2-√2)(2+√2).

2(2+√2)-√2(2+√3)

4+2√2-2√2-√6

4-√6...

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Answer 2

Answer:

▶Here's your answer

⏩By using identity

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

⏩So

$(2 - \sqrt{2)} (2 + \sqrt{2} ) \\ \\ = {2}^{2} - { \sqrt{2} }^{2} \\ \\ = 4 - 2 \\ \\ = 2$

⏩Hence, the given number is rational....

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