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r2001
@r2001
July 2022
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Найдите два числа, если их произведение равно -24, а сумма первого и удвоенного второго равна 13
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amin07am
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Ответ ₩¥£€€¥₩₩¥€£¥₩₩£££¥₩₩
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miron2077
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Х первое
у второе
ху=-24
х+2у=13
х=13-2у
у(13-2у)=-24
13у-2у²=-24
2у²-13у-24=0
D=169+192=361=(⁺₋19)²
у₁=(13+19)/4=8
у₂=(13-19)/4=-1,5
х₁=13-2у₁=-3
х₂=13-2у₂=16
-3 и 8; 16 и -1,5
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Answers & Comments
Verified answer
Ответ ₩¥£€€¥₩₩¥€£¥₩₩£££¥₩₩Verified answer
Х первоеу второе
ху=-24
х+2у=13
х=13-2у
у(13-2у)=-24
13у-2у²=-24
2у²-13у-24=0
D=169+192=361=(⁺₋19)²
у₁=(13+19)/4=8
у₂=(13-19)/4=-1,5
х₁=13-2у₁=-3
х₂=13-2у₂=16
-3 и 8; 16 и -1,5