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
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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