Question

simplyfy (5+2√2) (5-2√2) ​

Answer 1

Step-by-step explanation:

$(x + y)(x - y) = {x}^{2} - {y}^{2} \\ = {5}^{2} - {(2 \sqrt{2} )}^{2} \\ = 25 - 8 \\ = 17$

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