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оля1235577
@оля1235577
July 2022
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Решите систему уравнений у-3х=1 х2-ху+у2=9
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erzhan9210
У=3х+1
х²-х(3х+1)+(3х+1)²=9
х²-3х²-х+9х²+6х+1-9=0
7х²+5х-8=0
Д=5²-4*7*(-8)=25+224=249
не получается
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Answers & Comments
х²-х(3х+1)+(3х+1)²=9
х²-3х²-х+9х²+6х+1-9=0
7х²+5х-8=0
Д=5²-4*7*(-8)=25+224=249
не получается