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ulla0711
@ulla0711
August 2022
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решите уравнение
x^{2} +1,5х-7=0
с решением
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Answers & Comments
temur2795
D=(1.5)^2-4*7=30.25
x1=(-1.5+5.5)/2=2
x2=(-1.5-5.5)/2=3.5
0 votes
Thanks 1
wwwksyshhenk
Находим дискриминант - d= b^2-4ac (a = 1, b = 1.5, c = -7)
дискриминант равен = 30,25
находим корни уравнения
x1 = (-b+sqrtD)\2a= 2
х2 = (-b-sqrtD)\2a= -3,5
0 votes
Thanks 1
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Answers & Comments
x1=(-1.5+5.5)/2=2
x2=(-1.5-5.5)/2=3.5
дискриминант равен = 30,25
находим корни уравнения
x1 = (-b+sqrtD)\2a= 2
х2 = (-b-sqrtD)\2a= -3,5