решите биквадратное уравнение x^4 - 25x^2 +144=0
x^2=y
y^2-25y+144=0
y=16 x=4 x= -4
y=9 x=3 x=-3
]
t=
x=3 x=-3 x=-4 x=4
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x^2=y
y^2-25y+144=0
y=16 x=4 x= -4
y=9 x=3 x=-3
t=
t=
x=3 x=-3 x=-4 x=4