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waynerooney19
@waynerooney19
July 2022
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Решить уравнение: 2х2-5х-7=0
2х В квадрате!
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русская25
2х
²
- 5х - 7=0
D= 25+4*2*7= 25+56= 81
x
₁= 5+9/4= 3,5
х₂= 5-9/4= -1
Ответ: -1;3,5.
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Answers & Comments
D= 25+4*2*7= 25+56= 81
x₁= 5+9/4= 3,5
х₂= 5-9/4= -1
Ответ: -1;3,5.