Sagot :

Vins

[tex]bonjour\\\\\\A = 12 x - 6 + 2 x^{2} - 6 x + x - 3 \\A = 2 x^{2} + 7 x - 9 \\\\B = 3 x^{2} + 6 x - 2 x - 4 - ( x^{2} - 4 x + 5 x - 20 )\\B = 3 x^{2} + 4 x - 4 - x^{2} + 4 x - 5 x + 20 \\B = 2 x^{2} + 3 x + 16 \\\\\\[/tex]