bonjour
1) 3 ( x + 2) = 3 x + 6
2) - 5 ( 2 x - 7 ) = - 10 x + 35
3 ) 3 x ( 6 - x ) = 18 x - 3 x²
4 ) - 2 t ( t + 5) = - 2 t² - 10 t
5 ) ( x + 2) ( 3 x - 5 ) = 3 x² - 5 x + 6 x - 10 = 3 x² + x - 10
6 ) ( 3 x + 1 )² = 9 x² + 6 x + 1
7 ) ( 2 t - 5 )² = 4 t² - 20 t + 25
8 ) ( 4 x + 3 ) ( 4 x - 3) = 16 x² - 9
