(3x-5)(6x+7)-(3x-2)(6x+7)
A = (3x - 5)(6x + 7) - (3x - 2)(6x + 7)
A = 18x² + 21x - 30x - 35 - (18x² + 21x - 12x - 14)
A = 18x² - 9x- 35 - 18x² - 21x + 12x + 14
A = -18x - 21
A = (3x - 5)(6x + 7) - (3x - 2)(6x + 7) =18x² + 21x - 30x - 35 - (18x² + 21x - 12x - 14)=18x² - 9x- 35 - 18x² - 21x + 12x + 14= -18x - 21