Bonjour,
A = -8a + 2(3a - 5)
= -8a + 6a - 10
= -2a -10
B = 3(4+5a) -2(4+3a)
= 12 + 15a -8 - 6a
= 9a + 4
C = 6b (-2b+4) + 2b²
= -12b² + 24b + 2b²
= -10b² + 24b
D = H = -4b (3b-5) + 7 (-3b-5)
= -12b² + 20b -21b - 35
= -12b² -1b - 35
Bonne journée ^^ !
