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Кэти79
@Кэти79
August 2022
1
7
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решите квадратное уравнение
х^2+11=0;
х^2+4х-5=0;
2х^2-5х-7=0
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Answers & Comments
gyulia000
1) x(x+11)=0
x=0 или x+11=0
x=-11
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Thanks 0
gyulia000
x2=5
gyulia000
3) 2x^2-5x-7=0
Кэти79
напиши решение х1 и х2 во 2
gyulia000
щяс
gyulia000
x1=-4-6/2 =-5
gyulia000
x2=-4+6/2=5
gyulia000
3) D= 25+56=81
gyulia000
X1 = 5-9/4 =-1
gyulia000
x2=5+9/4=3.5
gyulia000
вроде так
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Answers & Comments
x=0 или x+11=0
x=-11