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нори4
@нори4
July 2022
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решите биквадратное уравнение х^4-20х^2+64=0
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hs228
Verified answer
X^2=t,t>=0
t^2-20t+64=0
D=20*2-4*64=400-256=144
t1=20+12/2=16; t2=20-12/2=4
x^2=16 x^2=4
x=4 x=2
x=-4 x=-2
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Answers & Comments
Verified answer
X^2=t,t>=0t^2-20t+64=0
D=20*2-4*64=400-256=144
t1=20+12/2=16; t2=20-12/2=4
x^2=16 x^2=4
x=4 x=2
x=-4 x=-2