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dasha200025
@dasha200025
July 2022
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mashuna11
Вот. Вводишь производную и решаешь, как обыкновенное уравнение через дискреминант.
1 votes
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natnet1
-x^4 - 4x^2 +5=0 /: -1
x^4 - 4x^2+5=0
x^2 =t >0
t^2 + 4t - 5=0
по теореме виета
t1+t2= - 4
t1 * t2= -5
t1= -5
t2=1
x^2= 1
x = 1, -1
x^4+4x^2 - 45=0
x^2= t >0
t^2 + 4t - 45=0
по теореме виета
t1+ t2= -4
t1* t2 = -45
t1 = -9
t2 = 5
x^2 = 5
x = √5, -√5
пж поставь лучший
0 votes
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Answers & Comments
x^4 - 4x^2+5=0
x^2 =t >0
t^2 + 4t - 5=0
по теореме виета
t1+t2= - 4
t1 * t2= -5
t1= -5
t2=1
x^2= 1
x = 1, -1
x^4+4x^2 - 45=0
x^2= t >0
t^2 + 4t - 45=0
по теореме виета
t1+ t2= -4
t1* t2 = -45
t1 = -9
t2 = 5
x^2 = 5
x = √5, -√5
пж поставь лучший