Sagot :

Bjr

1)

A = -(9x-5)

A = -9x+5

B = (7x-2)(3,8-8)

B = (7x-2)×(-4,2)

B = -29,4x + 8,4

2)

C = 20×2-32

C = 40-32

C = 8

D = -8x+13x

D = (-8+13)x

D = 5x