(х-2)(х+9)-(х+5)(х-5)=-14
x^2 + 9x - 2x - 18 - x^2 + 25 = -14
7x = -14 + 18 - 25
7x = - 21
x = -3
ответ: -3
(х-2)(х+9)-(х+5)(х-5)=-14
x^2 + 9x - 2x - 18 - x^2 + 25 = -14
7x = -14 + 18 - 25
7x = - 21
x = -3
ответ: -3