Verified answer

Bonsoir,

2)

A = - 3/4 + - 2,5/- 3,2

A = (3 x 8) / (4 x 8) + (2,5 x 10) / (3,2 x 10)

A = 24/32 + 25/32

A = 49/32

B = - 3/4 - - 2,5/- 3,2

B = - 24/32 - 25/32

A = - 49/32

C = - 3/4 + 2,5/3,2

C = - 24/32 + 49/32

C = 25/32

3)

- 4/5 x 25/- 32

= 100/160

= (20 x 5) / (20 x 8)

= 5/8