Répondre :
= x * 2x + x * (-1) + 7 * 2x + 7 * (-1)
= 2x² - x + 14x - 7
= 2x² + 13x - 7
(X+7)(2x-1)
2x exposants 2+ (-1x) + 7*2x+ 7*-1
2x exposants2 + (-1x) +14x+(-7)
2x exposants2 + 13x -7
2x exposants 2+ (-1x) + 7*2x+ 7*-1
2x exposants2 + (-1x) +14x+(-7)
2x exposants2 + 13x -7