bonjour
1 ) ( 7 x + 3 ) ( 4 x + 5 )
= 28 x² + 35 x + 12 x + 15
= 28 x² + 47 x + 15
2 ) ( 14 x +3 ) ( 2 x +5 )
= 28 x² + 70 x + 6 x + 15
= 28 x² + 76 x + 15
28 x² + 47 x + 15 ≠ 28 x² + 76 x + 15
