При x = -1:
(2 + 3(-1))(5 - (-1)) - (2 - 3(-1))(5 + (-1))
= (2 - 3)(5 + 1) - (2 + 3)(5 - 1)
= (-1)(6) - (5)(4)
= -6 - 20
= -26

При x = 1:
(2 + 3(1))(5 - 1) - (2 - 3(1))(5 + 1)
= (2 + 3)(5 - 1) - (2 + 3)(5 + 1)
= (5)(4) - (5)(6)
= 20 - 30
= -10

Итак, когда x = -1, получаем -26, а когда x = 1, получаем -10.