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arfremova
@arfremova
November 2021
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sedinalana
Verified answer
ОДЗ
x²-2x-8≤0
x1=x2=2 U x1*x2=-8⇒x1=-2 U x2=4
x∈[-2;4]
x²-6x+5=0
x1+x2=6 U x1*x2=5
x1=1
x2=5 не удов усл
x²-2x-8=0
x=-2 U x=4
Ответ x={-2;1;4}
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Answers & Comments
Verified answer
ОДЗ
x²-2x-8≤0
x1=x2=2 U x1*x2=-8⇒x1=-2 U x2=4
x∈[-2;4]
x²-6x+5=0
x1+x2=6 U x1*x2=5
x1=1
x2=5 не удов усл
x²-2x-8=0
x=-2 U x=4
Ответ x={-2;1;4}