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October 2021
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Алгебра 20 баллов
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ndusha
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1/(х+1) +1/(ч-2)=-1/2
2х-4+2х+2+х²-2х+х-2=0
х²+3х-4=0
х1+х2=-3 и х1*х2=-4⇒х1=-4 и х2=1
2)x²+px+q=0
x1=2p x2=q/2
[1+[2=-p
2p+q/2=-p
q/2=-3p
q=-6p
Подставим в уравнение
4p²+2p²-6p=0
6p²-6p=0
6p(p-1)=0
p=0-не удов усл
p=1⇒q=-6
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Answers & Comments
Verified answer
1/(х+1) +1/(ч-2)=-1/22х-4+2х+2+х²-2х+х-2=0
х²+3х-4=0
х1+х2=-3 и х1*х2=-4⇒х1=-4 и х2=1
2)x²+px+q=0
x1=2p x2=q/2
[1+[2=-p
2p+q/2=-p
q/2=-3p
q=-6p
Подставим в уравнение
4p²+2p²-6p=0
6p²-6p=0
6p(p-1)=0
p=0-не удов усл
p=1⇒q=-6