(2√2+3√5)(2√2-3√5) expand this
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use (a+b)(a-b)=a^2-b^2 formula
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(2√2+3√5)(2√2-3√5)
(2√2)²-(3√5)²
8-45
-37
(2√2)²-(3√5)²
8-45
-37
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