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Supprimer les parenthèses, puis rédı
expression
A=-(a + b) - (a - b) + (-a - b) + (-a + b);
B = -(x + 5) - x-2-(-x - 4) + (x - 1);
C=3-(a + b) - a - b - 3+ (3 - a -b)

merci d avance​

Sagot :

OCEANEHCKL

Réponse :

Bonjour,

Rappel:  -  - = +  / +  + = +  / -  + = -  / +  - = -

A=-(a + b) - (a - b) + (-a - b) + (-a + b)

A= -a -b - a +b -a + b -a -b

A= -4a

B = -(x + 5) - x-2-(-x - 4) + (x - 1)

B= -x - 5 - x - 2 + x + 4 + 1 - 1

B= - x - 3

C=3-(a + b) - a - b - 3+ (3 - a -b)

C= 3 - a - b - a - b - 3 + 3 - a - b

C= -3a - 3b + 3

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