bonjour
1) AD = x + 3 + x - 2 = 2 x + 1
Aire ABCD = ( 2 x + 1 )² = 4 x² + 4 x + 1
Aire ABEF = ( x + 3 ) ( 2 x + 1 )
Aire ECDF = ( x - 2 ) ( 2 x + 1 )
2 ) Aire B = ( x + 3 ) ( 2 x + 1 ) = 2 x² + x + 6 x + 3 = 2 x² + 7 x + 3
Aire C = ( x - 2 ) ( 2 x + 1 ) = 2 x² + x - 4 x - 2 = 2 x² - 3 x - 2
2 x² + 7 x + 3 + 2 x² - 3 x - 2 = 4 x² + 4 x + 1
