Bonsoir J'ai encore besoin d'aide SVP car je n'y arrive pas , Merci D= 7/3 + 3/2 x - 10/ 21 B= 4 / 5 : ( - 3 / 7 ) - 7 / 10 F = 6/5 - ( -1 / 9 ) x ( - 3 / 4 ) M

Bonsoir,

D = 7/3 + 3/2 x -10/21
D = 7/3 + (3 x 2 x (-5))/(2 x 3 x 7)
D = 7/3 + -5/7
D = 49/21 + -15/21
D = 34/21

B = 4/5 ÷ (-3/7) - 7/10
B = 4/5 x -7/3 - 7/10
B = -28/15 - 7/10
B = -56/30 - 21/30
B = -77/30

F = 6/5 - (-1/9) x (-3/4)
F = 6/5 - 3/36
F = 6/5 - 1/12
F = 72/60 - 5/60
F = 67/60

Bonne soiree

Bonsoir

D = 7/3 + 3/2 x (-10)/21
= 7/3 + (3 x (-10)) / (2 x 21)
= 7/3 + (3 x (-5) x 2) / (2 x 3 x 7)
= 7/3 + (-5)/7
= (7 x 7) / (3 x 7) + (-5 x 3) / (7 x 3)
= 49/21 + (-15)/21
= (49 - 15) / 21
= 34/21

B = 4/5 / (-3)/7 - 7/10
= 4/5 x 7/(-3) - 7/10
= (4 x 7) / (5 x (-3)) - 7/10
= 28/(-15) - 7/10
= (-28 x 10)/(15 x 10) - (7 x 15)/(10 x 15)
= -280/150 - 105/150
= (-280 - 105) / 150
= -358/150
= (-385 / 5) / (150 / 5)
= -77/30

F = 6/5 - (-1)/9 x (-3)/4
= 6/5 - (-1 x (-3)) / (9 x 4)
= 6/5 - (1 x 3) / (3 x 3 x 4)
= 6/5 - 1/12
= (6 x 12) / (5 x 12) - (1 x 5) / (12 x 5)
= 72/60 - 5/60
= (72 - 5) / 60
= 67/60

Voilà j'espère avoir pu t'aider ^^