Sagot :

105x (3x - 7) - 357 (-7 + 3x )

=105x (3x - 7) - 357 (3x-7 )

(3x-7)(105x-357)

Mimi85

E= 105x * 3x - 105x * 7 - 357 * -7 + 357 * 3x

E= 315x² - 735x + 2499 + 1071x

E=315x²  + 336x +2499