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4ev43yi3
@4ev43yi3
July 2022
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-7Х(в квадрате)-46х+21=0
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Verified answer
-7X
²-46x+21=0 | *(-1)
7X²+46x-21=0
X1,2=-46±
√2116+588/14.
Х1 = -46-52 / 14 = -98/14 = -7
Х2 = -46+52 / 14 = 6/14 = 3/7
Ответ: -7;3/7
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Answers & Comments
Verified answer
-7X²-46x+21=0 | *(-1)7X²+46x-21=0
X1,2=-46±√2116+588/14.
Х1 = -46-52 / 14 = -98/14 = -7
Х2 = -46+52 / 14 = 6/14 = 3/7
Ответ: -7;3/7