supprimer les parenthèses et reduire si possible A= 2x + 4- (8x - 9) B= 3a -7 - (2a+5)+(3a-10) C= 3t +1 - (4 - 6t) +[12 - (3 +t)] D = - (x + 5) - x - 2 - [3 - (
Mathématiques
karousseau
Question
supprimer les parenthèses et reduire si possible
A= 2x + 4- (8x - 9)
B= 3a -7 - (2a+5)+(3a-10)
C= 3t +1 - (4 - 6t) +[12 - (3 +t)]
D = - (x + 5) - x - 2 - [3 - (- x- 4) +5]
1 Réponse
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1. Réponse SOS48
A= 2x + 4- (8x - 9)
= 2x+4-8x+9
= -6x+13
B= 3a -7 - (2a+5)+(3a-10)
= 3a+7-2a-5+3a-10
= 4a-3-5
= 4a-8
C= 3t +1 - (4 - 6t) +[12 - (3 +t)]
=3t+1-4+6t+12-3-t
= 8t+6
D = - (x + 5) - x - 2 - [3 - (- x- 4) +5]
= -x-5-x-2-3-x+4-5
= -3x-11