Sagot :
bonjour
L = ( - 12/14 + 20 /35 ) x 98/25
L = ( - 6 /7 + 20/35 ) x 98/25
L = ( - 30/35 + 20 /35 ) x 98/25
L = - 10 /35 x 98/25
L = - 980 / 875 = - 28 / 25
M = - 14/15 + 10 /15 : 20/7
M = - 14 /15 + 10 /15 * 7/20
M = - 14/ 15 + 70 / 300
M = - 280/300 + 70/300
M = - 210/ 300 = - 7 / 10
N = 3/15 - 42/ 5 x ( - 5 /14 + 5 /21 )
N = 3/15 - 42 /5 x ( - 15 /42 + 10/42 )
N = 3/15 - 42/5 x - 5 /42
N = 3/15 + 210/ 225
N = 45 /225 + 210 /225
N = 255/225
N = 17/15
Réponse :
Bonjour
Explications étape par étape
L = (-12/14 + 20/35) X 98/25
L = (-6/7 +20/35) X 98/25
L = (-6/7 X 5/5 +20/35) X 98/25
L = (-30/35 +20/35) X 98/25
L = -10/35 X 98/25
L = -980/875
L = -28/25
M = - 14/15 + 10/15 : 20/7
M = - 14 /15 + 10/15 X 7/20
M = - 14/ 15 + 70/300
M = -14/15 X 20/20 + 70/300
M = -280/300 + 70/300
M = - 210/ 300
M = -7/10
N = 3/15 - 42/5 X (- 5 /14 + 5 /21 )
N = 3/15 - 42 /5 X (- 15 /42 + 10/42 )
N = 3/15 - 42/5 X - 5 /42
N = 3/15 + 210/ 225
N = 3/15 X 15/15 +210/225
N = 45 /225 + 210/225
N = 255/225
N = 17/15