Bonjour
A = (-2) x (-5) - (-5)^2
A = 10 - 25
A = -15
B = -30 : (-4 + 6) + (-5,5)
B = -30 : 2 - 5,5
B = -15 - 5,5
B = -20,5
C = -5/8 + 5/12
C = (-5 x 3)/(8 x 3) + (5 x 2)/(12 x 2)
C = -15/24 + 10/24
C = -5/24
D = -14/25 : (-7/15)
D = -14/25 x 15/7
D = (-14 x 15)/(25 x 7)
D = -14/7 x 15/25
D = (-2 x 7)/7 x (5 x 3)/( 5 x 5)
D = -2 x 3/5
D = -6/5
