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Olga8963
@Olga8963
July 2022
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Решите уравнение :
1) 3x²-11x-14=0
2)x²-4x+3=0
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857Принцесска857
1) D= 121+168= 289
x1/2= (121+-17)/6
x1= 23
x2= 19
2) D= 16-12= 4
x1/2= (16+-2)/2
x1= 9
x2= 7
2 votes
Thanks 2
Timosha11111
1)3х^2-11х-14=0
#решаем по дискрименанту
D=121+168=289
#корень из 289=17
х1=(11+17)/6=23
х2=(11-17)/6=19
Ответ: х1=23 х2=19
2 votes
Thanks 1
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Answers & Comments
x1/2= (121+-17)/6
x1= 23
x2= 19
2) D= 16-12= 4
x1/2= (16+-2)/2
x1= 9
x2= 7
#решаем по дискрименанту
D=121+168=289
#корень из 289=17
х1=(11+17)/6=23
х2=(11-17)/6=19
Ответ: х1=23 х2=19