Répondre :
A = 3 ( 15a - 4 )
=45a-12
B = 7 + (2b + 3 )
=2b+10
C = 2 * ( x * y )
=2xy
D = 9 - ( a + 5 )
=-a+4
E = 0.5 ( 44a + 30b )
=22a+15b
=45a-12
B = 7 + (2b + 3 )
=2b+10
C = 2 * ( x * y )
=2xy
D = 9 - ( a + 5 )
=-a+4
E = 0.5 ( 44a + 30b )
=22a+15b