Sagot :
A = -7 - (2 - 7) + 8 x 1/2
A = -7 + 5 + 4
A = -7 + 9
A = 2
B = 5 (3 - 8) - 2 (-1 - 3)
B = -25 + 8
B = -17
A = -7 + 5 + 4
A = -7 + 9
A = 2
B = 5 (3 - 8) - 2 (-1 - 3)
B = -25 + 8
B = -17