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kozhukhovamash
@kozhukhovamash
August 2022
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ПОЖАЛУЙСТА РЕШИТЕ СРОЧНО 2 ДРОБНЫХ УРАВНЕНИЯ С ДИСКРИМИНАНТОМ
1)x+1/x+4=2/x+4
2)x^2/x^2-9=x/x^2-9
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Hfzdhhvn
Х²+1+4х=2+4х
Х²+1+4х-2-4х=0
Х²-1=0
Х1=1
Х2=-1
Вроде так
1 votes
Thanks 1
Hfzdhhvn
А во втором вроде пропорция
kozhukhovamash
спасибо
shetmike
(х+1)×(х+4)=2×(х+4)
х²+4х+х+4=2х+8
х²+4х+х-2х=8-4
х²+3х=4
-х²-3х-4=0
D= b²-4ас
D= -3²- 4×1×(-4)=25
х1,2= -b±√D/2a
x1=3+5/2×1=8/2=4
x2=3-5/2×1= -2/2= -1.
x1=4, x2= -1. ???
Hfzdhhvn
Знак делить там,не?
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Answers & Comments
Х²+1+4х-2-4х=0
Х²-1=0
Х1=1
Х2=-1
Вроде так
х²+4х+х+4=2х+8
х²+4х+х-2х=8-4
х²+3х=4
-х²-3х-4=0
D= b²-4ас
D= -3²- 4×1×(-4)=25
х1,2= -b±√D/2a
x1=3+5/2×1=8/2=4
x2=3-5/2×1= -2/2= -1.
x1=4, x2= -1. ???