Question

write the value of (5+√5) (5-√5)​

Answer 1

Answer:

20

Step-by-step explanation:

Answer 2

Answer:

$(5 + \sqrt{5} )(5 - \sqrt{5} ) \\ \\ = {(5)}^{2} - {( \sqrt{5} )}^{2} \\ \\ = 25 - 5 \\ \\ = 20 \\ \\ formula \: used \\ \\ (a + b)(a - b) \\ \\ = {a}^{2} - {b}^{2}$

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