Решите уравнение
(X-3)(x+2)-(x-1)(x+1) = 3x+7

x^2 - x - 6 - (x^2 - 1) = 3x + 7x^2 - x - 6 - x^2 + 1 = 3x + 7 - x - 5 = 3x + 7- x - 3x = 7 + 5- 4x = 12x = - 12/4x = - 3 

(х-3)(х-2)-(х-1)(х+1)=3х+7х2-2х-3х+6-х2-х=3х+7х2-2х-3х-х2-х-3х=7-6-3х=1х=1-3х=-2