Sagot :
(15x²-6x+35x-14)-(4x²-6x-6x+9)
= 15x²+29x-14+4x²+12x-9
= 19x² +41x -23
Bonsoir,
(3x+7)(5x-2)-(2x-3)(2x-3)
= 15x² - 6x + 35x - 17 - (2x² - 12x + 9)
= 15x² - 6x + 35x - 14 - 4x² + 12x - 9
Maintenant il te suffit de réduire.
= 11x² + 41x - 23