bonjour
A = ( √2 + √3 )² = 2 + 2 √6 + 3 = 5 + 2 √6
B = ( √7 - √5 )² = 7 - 2 √35 + 5 = 12 - 2 √35
C = ( √11 - √13 ) ( √11 + √13) = 11 - 13 = - 2
D = ( 3 √5 - √2 )² = 45 - 6 √10 + 2 = 47 - 6 √10
E = ( 8 √7 + 2 √6) ( 8 √7 - 2 √6) = 448 - 24 = 424
F = ( 7 √3 - 2 √5 )² = 147 - 28 √15 - 20 = 127 - 28 √15
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bonjour
A = ( √2 + √3 )² = 2 + 2 √6 + 3 = 5 + 2 √6
B = ( √7 - √5 )² = 7 - 2 √35 + 5 = 12 - 2 √35
C = ( √11 - √13 ) ( √11 + √13) = 11 - 13 = - 2
D = ( 3 √5 - √2 )² = 45 - 6 √10 + 2 = 47 - 6 √10
E = ( 8 √7 + 2 √6) ( 8 √7 - 2 √6) = 448 - 24 = 424
F = ( 7 √3 - 2 √5 )² = 147 - 28 √15 - 20 = 127 - 28 √15