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lollipop220
@lollipop220
July 2022
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Найти корни уравнения:
3/х+7=2/9-х
х/х-5=6/25-х^2
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sedinalana
Verified answer
3/х+7=2/9-х
x≠-7 U x≠9
3(9-x)=2(x+7)
27-3x=2x+14
2x+3x=27-14
5x=13
x=2,6
х/х-5=6/25-х^2
x/(x-5)=-6/(x-5)(x+5)
x≠5 U x≠-5
x(x+5)=-6
x²+5x+6=0
x1+x2=-5 U x1*x2=6
x1=-3 U x2=-2
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lollipop220
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Answers & Comments
Verified answer
3/х+7=2/9-хx≠-7 U x≠9
3(9-x)=2(x+7)
27-3x=2x+14
2x+3x=27-14
5x=13
x=2,6
х/х-5=6/25-х^2
x/(x-5)=-6/(x-5)(x+5)
x≠5 U x≠-5
x(x+5)=-6
x²+5x+6=0
x1+x2=-5 U x1*x2=6
x1=-3 U x2=-2