A = 3 x (59 - 5x4²) - (8-13) = B = 17 - 25 x 1 _ _ _ = 3 2 15 C = 3 - 2 --- 3 ________ Calculer B et C
Mathématiques
jaimelagalette
Question
A = 3 x (59 - 5x4²) - (8-13) =
B = 17 - 25 x 1
_ _ _ =
3 2 15
C = 3 - 2
---
3
________ Calculer B et C et donner le résultat
4 x 7 sous la forme d'une fraction irréductible.
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3
1 Réponse
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1. Réponse winner123
Bonjour
A = 3 x (59 - 5x4²) - (8-13) = 3 x (59 - 5x 16) - (-7)
A = 3 x (59 - 80) +7
A = 3 x - 21 +7 = - 66 +7 = - 59
B = 17/3 - 25/2 x 1/15
17/3 - 25/30
170/30 -25/30 = 145/30 = 29/6
C =( 3 -2/3) : (4/3 x 7)
C = (9/3 -2/3) : 28/3
C = 7/3 x 3/28
C = 21/84 = 1/4