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2 ( 5 - √2 ) + 3 ( 5 + √2 )
10 - 2√2 + 15 + 3√2
25 + √2
b.
( 5 - √2 ) ² + ( 5 + √2 ) ²
25 - 10√2 + 2 + 25 + 10√2 + 2
54