(X^2-1)(x^2+3)=(x^2+1)^2+x

Question

(X^2-1)(x^2+3)=(x^2+1)^2+x

Answer 1

X^4 +2X^2-3=X^4+2X^2+1+X
X=-3-1
X=-4
Ответ:-4

Answer 2

(x²-1)(x²+3) = (x²+1)²+x;
x^4+2x²-3 = x^4+2x²+1+x;
x = -4