absent au cours mais tu as eu une leçon ?
( 4 x + 10 ) ( 4 x - 10 ) = 16 x² - 100
( 2 - 3 x)² = 9 x² - 12 x + 4
( 9 + 6 x ) ( 9 - 6 x ) = 81 - 36 x²
( 4 x - 3 )² = 16 x² - 24 x + 9
( x - 4 ) ( x + 4 ) = x² - 16
( 3 x + 9 )² = 9 x² + 54 x + 81
16 x² - 64 = ( 4 x - 8 ) ( 4 x + 8 )
100 x² + 120 x + 36 = ( 10 x + 6 )²
49 - 36 x² = ( 7 - 6 x ) ( 7 + 6 x )
49 - 42 x + 9 x² = ( 3 x - 7 )²
64 x² - 1 = ( 8 x - 1 ) ( 8 x + 1 )
25 x² - 30 x + 9 = ( 5 x - 3 )²
