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hirondelle52

Bonjour,

A=

7/3 -4/3*5/8

= 7/3 -20/24

= 7/3 -10/12

= 7/3 -5/6

= 7/3*2/2 -5/6

=14/6 -5/6

= 9/6 = 3/2 = 1,5

E=

(4/5 *2/2 -3/2 *5/5)/ ( -9/4* 3/3 -1/6 * 2/2)

= (8/10 -15/10) /(-27/12 -2/12)

= (-7/10 )/ ( 29/12)

=-7/10* 12/29

= -84/ 290 = -42/ 145

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