bonjour
A = - 2 x ( 3 - 4 x) - ( 5 - 2 x )
A = - 6 x + 8 x² - 5 + 2 x = 8 x² + 8 x - 5
B = - 3 ( 2 x + 1) = - 6 x - 3
tu remplaces maintenant x par 2
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bonjour
A = - 2 x ( 3 - 4 x) - ( 5 - 2 x )
A = - 6 x + 8 x² - 5 + 2 x = 8 x² + 8 x - 5
B = - 3 ( 2 x + 1) = - 6 x - 3
tu remplaces maintenant x par 2