Qui pourrait m’aider ? Svp

bonsoir
A = - 3 x - 21
B = 8 x - 12
C = 11 x + 55
D = 2 x² + 9 x
E = - 18 x - 12 x²
F = - 20 x + 10 x²
= - 3 x - 21
= 8 x - 12
= 11 x + 55
= 2 x² + 9 x
= - 18 x - 12 x²
= - 20 x + 10 x²