Bonjour vous pouvez me dire si c'est juste svp et si c'est faux vous pouvez me corriger svp merci d'avance ! Calculer et simplifier les expressions suivantes :
= 3 × ( − 9) = (3*x+) (3*9)=3x+27
= −2 × (4 + 1) − 5 + ( + 2)= (-2*4x)+ (2*1) (+5x*x) (+5x*2)= (-8x-2) + (-5x2-10)=-5x2-8x-12
= 5 − (8 − 3)=5x – (-8+3x)= (5x*-8) + (5x*-3x)=-15x2-40x
= − (5 − 3) − 7 − (−4 + 1)= (-5+3x)+7+ (4x-1) = (7*-5) + (7*3x)+ (7*4x)+ (7*-1)= -35+21x+28x-7= 49x - 42
= 3 × ( − 9) = (3*x+) (3*9)=3x+27
= −2 × (4 + 1) − 5 + ( + 2)= (-2*4x)+ (2*1) (+5x*x) (+5x*2)= (-8x-2) + (-5x2-10)=-5x2-8x-12
= 5 − (8 − 3)=5x – (-8+3x)= (5x*-8) + (5x*-3x)=-15x2-40x
= − (5 − 3) − 7 − (−4 + 1)= (-5+3x)+7+ (4x-1) = (7*-5) + (7*3x)+ (7*4x)+ (7*-1)= -35+21x+28x-7= 49x - 42
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