Bonjour pouvez vous m’aider ? A = 2(4x - 2) B = x(2x+7)-2x C = (4x+5)(7+x)+(3x-1)

bonjour

A = 2(4 x - 2)   = 8 x - 4

B = x(2 x+7)-2 x = 2 x² + 7 x - 2 x  = 2 x² + 5 x

C = (4 x+5)(7+x)+(3 x-1) = 28 x + 4 x² + 35 + 5 x + 3 x - 1

=  4 x² 36 x + 34