Respuesta :

Avision

Answer:

-1/2

Step-by-step explanation:

2/5 * - 3/7 - 1/14 - 3/7 * 3/5

= - 6/35 - 1/14 - 9/35

= - (6*2)/(35*2) - (1*5)/(15*5) - (9*2)/(35*2)

= - 12/70 - 5/70 - 18/70

= (-12 - 5 - 18)/70

=- 35/70

= - 1/2
2/5 * - 3/7 - 1/14 - 3/7 * 3/5
- 6/35 - 1/14 - 9/35
- (6*2)/(35*2) - (1*5)/(15*5) - (9*2)/(35*2)
- 12/70 - 5/70 - 18/70
= (-12 - 5 - 18) /70
=- 35/70
- 1/2