Bonsoir,
A= -14/25 * -15/7
= -2/25 * -15
= -2/5 *-3
= 6/5
B= 1/5 + 6/5 *35/12
= 1/5 +1/5 * 35/2
= 1/5 + 1* 7/2
= 1/5 +7/2
= 2/10 + 14/10
= 16/10 = 8/5
C)
4/5 -3/2 = 8/10 - 15/10 = - 7/10
-3/4 +1/6 = -9/12 + 2/12 = -7/12
(-7/10 ) / (-7/12)
= -7/10 * -12/7
= 7/10 *12/7
= 12/10 = 6/5