Bonjour,
A= -4/9 *8
A= -32/9
.
B= 8/9 * -2/3
B= -16/27
.
C= -15/16 * 12/35
C= -180/560
C= -9/28
.
D= -4/21 * 9/-12 *28/27
D= -36/-252 * 28/27
D= 1/7 * 28/27
D= 28/189
D= 4/27
.
mutliplication des fractions:
[tex] \frac{a}{b} \times \frac{c}{d} = \frac{a \times c}{b \times d} [/tex]
Bonne journée.
