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nevedrova99
@nevedrova99
July 2022
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помогите оочень надоо
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КираQ
О.З: (х-4)(х-10)
10(х-10)+4(х-4)=2(х-4)(х-10)
10х-100+4х-16-2х^2+20х+8х-80=0
-2х^2+42х-196=0 (сократим все на 2)
х^2+21х-98=0
D=441-392=49
√D=7
x1=21+7/-2=-14
x2=21-7/-2=-7
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Answers & Comments
10(х-10)+4(х-4)=2(х-4)(х-10)
10х-100+4х-16-2х^2+20х+8х-80=0
-2х^2+42х-196=0 (сократим все на 2)
х^2+21х-98=0
D=441-392=49
√D=7
x1=21+7/-2=-14
x2=21-7/-2=-7