Bonjour vous pouvez m’aider stp I=1/2-(1/4+3/4*7/5)

Bonjour

I=1/2-(1/4+3/4*7/5)

I = 1/2 - (1/4 + 21/20)

I = (1 x 10) / (2 x 10) - [(1 x 5) / (4 x 5) + 21/20]

I = 10/20 - (5/20 + 21/20)

I = 10/20 - 26/20

I = - 16/20

I = (4 x - 4) / (4 x 5)

I = - 4/5.