(x + y^2)^2 - (y^2 - 2)(y^2 + 2) - 2xy^2
= x^2 + 2xy^2 + y^4 - (y^4 - 4) - 2xy^2= x^2 + 2xy^2 + y^4 - y^4 + 4 - 2xy^2= x^2 + 4
(-5)^2 + 4= 25 + 4= 29
Ответ: 29.
(x + y^2)^2 - (y^2 - 2)(y^2 + 2) - 2xy^2
= x^2 + 2xy^2 + y^4 - (y^4 - 4) - 2xy^2
Подставим x = -5:= x^2 + 2xy^2 + y^4 - y^4 + 4 - 2xy^2
= x^2 + 4
(-5)^2 + 4
= 25 + 4
= 29
Ответ: 29.