Besoin d'aide svp.
Calculer les expressions suivantes.
![Besoin daide svpCalculer les expressions suivantes class=](https://fr-static.z-dn.net/files/d44/d55430449960b483c6fcc93b6bf12e18.jpg)
L = - 7/5 : ( 2/9 - 7 /18 )
= - 7 /5 : ( 4/18 - 7/18 )
= - 7/5 : 3 /18
= - 7/5 x 18/3
= - 126/15
M = ( 4/5 - 3 /2 ) : ( - 9/4 - 1/6 )
= ( 8/10 - 15/10 ) : ( - 27/12 - 2 /12 )
= - 7 /10 : - 29/12
= - 7/10 x - 12/29
= 84/290
= 42 /145
L = -7/5 ÷ (4/18 - 7/18)
= -7/5 ÷ -3/18
= -7/5 × -18/3
= 126/15
M = (8/10 -15/10) ÷ (-27/12 -2/12)
= -7/10 ÷ -29/12
= -7/10 × -12/29
= 84/290 = 42/145