Question

Решите задания 71 (1,2)​

Answer 1

1) x^4-5x^2+4=0

x^-x^2-4x^2+4

x^2*(x^2-1)-4(x^2-1)

(x^2-1)*(x^2-1)

(x-1)*(x+1)*(x-2)*(x+2)

второе хз