Bonjour pourriez-vous m aider pour l exercice 2 merci

Bonjour,

a = 2/3 ; b = - 3/2 ; c = - 3/4

A = 3a - b - c

A = 3 * 2/3 - (- 3/2 - (- 3/4))

A = 6/3 - (- 3/2 + 3/4)

A = 2 - (- 6/4 + 3/4)

A = 2 - (- 3/4)

A = 8/4 + 3/4

A = 11/4

B = 6b² + c

B = 6 * (- 3/2)² + (- 3/4)

B = 6 * (- 3²/2²) - 3/4

B = 6 * 9/4 - 3/4

B = 54/4 - 3/4

B = 51/4

B = 12,75.

C = (a + c) / (a - b)

C = (2/3 - 3/4) / (2/3 - (- 3/2))

C = (8/12 - 9/12) / (4/6 + 9/6)

C = - 1/12 : 13/6

C = - 1/12 x 6/13

C = - 6/156

C = - 1/26.