bonjour
A = 3 ( 2 x + 13 ) + 5 ( 8 - 11 x )
= 6 x + 39 + 40 - 55 x
= - 49 x + 79
B = - 4 x ( 8 x - 15 ) + ( - 3 + x ) * 2 x
= - 32 x² + 60 + ( - 6 x + 2 x² )
= - 32 x² + 60 - 6 x - 2 x²
= - 34 x² - 6 x + 60
C = ( - 7 x + 3) * 7 - 6 ( 8 x - 3 )
= - 49 x + 21 - 48 x + 18
= - 97 x + 39
D = - 2 x ( 1 - x ) - 9 ( - x² + 5 x )
= - 2 x + 2 x² + 9 x² - 45 x
= 11 x² - 47 x
E = ( 2 x + 3 ) ( 8 - 11 x )
= 16 x - 22 x² + 24 - 33 x
= - 22 x² - 17 x + 24
F = ( - 4 x - 5) ( 6 + x )
= - 24 x - 4 x² - 30 - 5 x
= - 4 x² - 29 x - 30
G = ( 7 - 9 x ) ( - 3 x + 8 )
= - 21 x + 56 + 27 x² - 72 x
= 27 x² - 93 x + 56
