Il y a que trois questions merci d’avance

bonjour

A = ( 2 x 5 ²) ³ / 2 x 25 ³

A = 2 ³ x 5 ⁶/ 2 x ( 5 ²) ³

A = 2 ³ x 5 ⁶/ 2 x 5 ⁶

A = 2 ³ / 2

A = 2 ²

A = 5 /2 + 2 /3

A = 15/6 + 4/6 = 19 /6

inverse = 6/19

2/3 ( x - 4/5) - 3 x /4 + 1/5

2 x /3 - 8/15 - 3 x /4 + 1 /5

= 40 x /60 - 32/60 - 45 x /60 + 12/60

= - 5 x /60 - 20 /60

= - x /12 - 1/3