Sagot :
bjr
3 x (4a + 5b) = 3 x 4a + 3 x 5b = 12a + 15b
2 x (d + 4c) = 2 x d + 2 x 4 c = 2d + 8c
et
4 x (3a + 6) = 4 x 3a + 4 x 6 = 12a + 24
puisque que k x (a + b) = k x a + k x b
et
102 x 24 = (100 + 2) x 24 = 24 x (100 + 2) = 24 x 100 + 24 x 2 = 2400 + 48
= 2448
bonjour
3 x ( 4 a + 5 b ) = 3 * 4 a + 3 * 5 b = 12 a + 15 b
( d + 4 e ) x 2 = d * 2 + 4 e * 2 = 2 d + 8 e
4 x ( 3 a + 6 ) = 4 * 3 a + 4 * 6 = 12 a + 24
102 x 24
= 100 x 24 + 2 x 24 = 2400 + 48 = 2 448