Bonjour je dois faire l’exercice 50 de mon manuel mais je n’ai pas compris quelqu’un pourrais m’aider ? merciiiiiiiii

Réponse:

S = -15/28 : -25/42

S = -15/28 x (-42/25)

S = 15/28 x 42/25

S = 15/25 x 42/28

S = (3x5) /(5x5) x (3x14) /(2x14)

S = 3/5 x 3/2

S = 9/10

T = 63/44 : (-72/55)

T = 63/44 x -55/72

T = (-55/44) x 63/72

T = (-5x11) / (4x11) x (9x7) / (9x8)

T = -5/4 x 7/8

T = -35/32

U = 12/(45/16)

U = 12 x 16/45

U = (3x4) x 4 x 4 / (3x15)

U = 64/15

V = -48/(32/21)

V = -48 x 21/32

V = -48/32 x 21

V = (-3x16) / (2x16) x 21

V = (-3/2) x 21

V = -63/2

W = -5/12 + 7/12 : 5/18

W = -5/12 + 7/12 x 18/5

W = -5/12 + 7/5 x 18/12

W = -5/12 + 7/5 x (3x6) / (2x6)

W = -5/12 + 7/5 x 3/2

W = -5/12 + 21/10

W = (-5x5) / (12x5) + (21x6) /(10x6)

W = -25/60 + 126/60

W = 101/60

X = (-1/24-(-2/24)) / (-3/8-1)

X = (-1/24 + 2/24) / (-3/8 - 8/8)

X = 1/24 / (-11/8)

X = 1/24 x (-8/11)

X = -8/24 x 1/11

X = -1/3 x 1/11

X = -1/33