Réponse :
Bonjour
Calculs
A = (x + 3)(y + 2)
A = x × y + 2 × x + 3 × y + 3 × 2
A = x y + 2 x + 3 y + 6
B = ( 3 - 2x)( 4 - x)
B = 3 × 4 - 3 × x - 2x × 4 + 2 x × x
B = 12 - 3 x- 8 x + 2 ²x
B = 2x² - 11 x + 12
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Réponse :
Bonjour
Calculs
A = (x + 3)(y + 2)
A = x × y + 2 × x + 3 × y + 3 × 2
A = x y + 2 x + 3 y + 6
B = ( 3 - 2x)( 4 - x)
B = 3 × 4 - 3 × x - 2x × 4 + 2 x × x
B = 12 - 3 x- 8 x + 2 ²x
B = 2x² - 11 x + 12