X^4 + 5x^2 + 4 = 0
x^2 = a ; a > 0
a^2 + 5a + 4 = 0
D = 25 - 16 = 9 = 3^2
a1 = ( - 5 + 3 ) : 2 = - 1 ( < 0 )
a2 = ( - 5 - 3 ) : 2 = - 4 ( < 0 )
ОТВЕТ корней нет
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3x^3 - 2x^2*( x^4 + 1 ) = 0
3x^3 - 2x^6 - 2x^2 = 0
ОТВЕТ 6
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( x^2 + 2x )^2 - 2*( x^2 + 2x ) - 3 = 0
x^2 + 2x = a
a^2 - 2a - 3 = 0
D = 4 + 12 = 16 = 4^2
a1 = ( 2 + 4 ) : 2 = 3
a2 = ( 2 - 4 ) : 2 = - 1
x^2 + 2x = 3
x^2 + 2x - 3 = 0
D = 4 + 12 = 16 = 4^2
x1 = ( - 2 + 4 ) : 2 = 1
x2 = ( - 2 - 4 ) : 2 = - 3
x^2 + 2x = - 1
x^2 + 2x + 1 = 0
D = 4 - 4 = 0
x = ( - 2 ) : 2 = - 1
ОТВЕТ 1 ; - 3 ; - 1