bonsoir
A = ( 1 /3 - 3 ) : ( 1 /3 + 7 )
= ( 1/3 - 9/3 ) : ( 1 /3 + 21/3 )
= - 8 /3 : 22 /3
= - 8/3 * 3/22
= - 24 / 66
= - 4 / 11
B = 4 ( - 1 /3 ) ²+ 5 ( - 1/3) - 3
= 4 * 1/9 - 5 /3 - 3
= 4/9 - 15/9 - 27/9
= - 38/ 9
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bonsoir
A = ( 1 /3 - 3 ) : ( 1 /3 + 7 )
= ( 1/3 - 9/3 ) : ( 1 /3 + 21/3 )
= - 8 /3 : 22 /3
= - 8/3 * 3/22
= - 24 / 66
= - 4 / 11
B = 4 ( - 1 /3 ) ²+ 5 ( - 1/3) - 3
= 4 * 1/9 - 5 /3 - 3
= 4/9 - 15/9 - 27/9
= - 38/ 9