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elodielebigot35
@elodielebigot35
November 2020
1
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j ai besoin d aide svp
Réduire les expressions suivantes :
2-(a + 5)
(3-2а) - (2a - 7)
7a - (- 3a + 4)
3(2a-5) - (5a-3)
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alexia1102
2-(a+5)
= 2 -a - 5
= -a +2-5
= -a -3
(3-2a) - (2a-7)
= 3 -2a -2a +7
= -2a - 2a +3 +7
= -4a +10
7a - (-3a +4)
= 7a +3a -4
= 10a -4
je pense que tu as oublié un signe entre le 3 et la parenthèse pour la dernière
sinon voilà :))
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Lista de comentários
= 2 -a - 5
= -a +2-5
= -a -3
(3-2a) - (2a-7)
= 3 -2a -2a +7
= -2a - 2a +3 +7
= -4a +10
7a - (-3a +4)
= 7a +3a -4
= 10a -4
je pense que tu as oublié un signe entre le 3 et la parenthèse pour la dernière
sinon voilà :))