bonjour voici des calculs que je doit faire pour demain merci de m´aider

Bonsoir,

A = 10 - (7 - 9)⁴
          8 - 10
A = 10 - (- 2)⁴
          - 2
A = 10 - (16)
          - 2
A = 10 - 16
         - 2
A = - 6/- 2
A = 3

B = (3/2)² - 1/3 x 3/5 = 41/20
B = (3²/2²) - 3/15 = 41/20
B = 9/4 - 3/15 = 41/20
B = 9/4 - (3 x 1) / (3 x 5) = 41/20
B = 9/4 - 1/5 = 41/20
B = (9 x 5) / 4 x 5) - (1 x 4) / (5 x 4) = 41/20
B = 45/20 - 4/20 = 41/20
B = 41/20 = 41/20