Bonjour
B = -28/-12 x 15/35
B = (28 x 15)/(12 x 35)
B = (7 x 4 x 3 x 5)/(3 x 4 x 7 x 5)
B = 1
D = 8/-9 x 72/-25 x 45/-16 + (-8/10)
D = -(8 x 72 x 45)/(9 x 25 x 16) - 8/10
D = -(2 x 4 x 8 x 9 x 9 x 5)/(9 x 5 x 5 x 2 x 8) - 8/10
D = -(4 x 9)/5 - 8/10
D = -36/5 - 8/10
D = (-36 x 2)/(5 x 2) - 8/10
D = -72/10 - 8/10
D = -80/10
D = -(8 x 10)/10
D = (-8)
