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Dans l'exercie 56 et 57 simplifier si possible.
56) A= 3 x (a + 5) + 2a
B= 8a + 4 x (a + 3)
C= 7 + 3 x (a + 1)
D= (a + 4) x 5 + 8
57) A= 8 + (b - 3) x 2
B= 6b + 2 x ( 5 - b)
Dans l'exercie 56 et 57 simplifier si possible.
56) A= 3 x (a + 5) + 2a
B= 8a + 4 x (a + 3)
C= 7 + 3 x (a + 1)
D= (a + 4) x 5 + 8
57) A= 8 + (b - 3) x 2
B= 6b + 2 x ( 5 - b)
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Verified answer
56)3 * (a + 5) + 2a = 3 * a + 3 * 5 + 2a = 3a + 15 + 2a = 5a + 15
8a + 4(a + 3) = 8a + 4a + 12 = 12a + 12
7 + 3(a + 1) = 7 + 3a + 3 = 3a + 10
5(a + 4) + 8 = 5a + 20 + 8 = 5a + 28
Pareil pour le 57
56)
A= 3 x (a + 5) + 2a
A = 3a + 15 + 2a
A = 5a + 15
B= 8a + 4 x (a + 3)
B = 8a + 4a + 12
B = 12a + 12
C= 7 + 3 x (a + 1)
C = 7 + 3a + 3
C = 3a + 10
D= (a + 4) x 5 + 8
D = 5a + 20 + 8
D = 5a + 28
57)
A= 8 + (b - 3) x 2
A = 8 + 2b - 6
A = 2b + 2
B= 6b + 2 x ( 5 - b)
B = 6b + 10 - 2b
B = 4b + 10