bonjour
( 1 + √2)² = 1 + 2 √2 + 2 = 3 + 2 √2
( 3 - √2)² = 9 - 6 √2 + 2 = 11 - 6 √2
( 4 + 2 √2 )² = 16 + 16√2 + 8 = 24 + 16 √2
( 4 - √2) ( 4 + √2) = 16 - 2 = 14
( 23 x + 1 ) ( - 17 x + 1 ) + ( 23 x + 1 )²
( 23 x + 1 ) ( - 17 x + 1 + 23 x + 1 )
( 23 x + 1 ) ( 6 x + 2 )
= 2 ( 23 x + 1 ) ( 3 x + 1 )
( 13 x - 14 ) ( 25 x - 11 ) - ( 13 x - 14 )²
( 13 x - 14 ) ( 25 x - 1 - 13 x + 14 )
( 13 x - 14 ) ( 12 x + 13 )
c : factoriser 8 - 18 x
d : factoriser 16 t + 13
e : factoriser - 14 x + 5
