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DAnilromanchuk
@DAnilromanchuk
June 2022
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решите срочно алгебра
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ann1885
1)
4(х²+3х)+х-3х²=16х
4х²+12х+х-3х²-16х=0
х²-3х=0
х(х-3)=0
х=0 и х=3
2)
х²+3х=-(х²-х) ОДЗ х≠4
х²+3х=х-х²
х²+3х+х²-х=0
2х²+2х=0
х²+х=0
х(х+1)=0
х=0 и х=-1
3)
х(2х+3)=(х+2)(3х+2) ОДЗ х≠0 и х≠-2
2х²+3х=3х²+2х+6х+4
2х²+3х-3х²-2х-6х-4=0
-х²-5х-4=0
х²+5х+4=0
D=25-16=9
х1=-5-3 /2= -4
х2=-5+3 /2=-1
2 votes
Thanks 2
DAnilromanchuk
спасибо
ann1885
отметь как лучший пож
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Answers & Comments
4(х²+3х)+х-3х²=16х
4х²+12х+х-3х²-16х=0
х²-3х=0
х(х-3)=0
х=0 и х=3
2)
х²+3х=-(х²-х) ОДЗ х≠4
х²+3х=х-х²
х²+3х+х²-х=0
2х²+2х=0
х²+х=0
х(х+1)=0
х=0 и х=-1
3)
х(2х+3)=(х+2)(3х+2) ОДЗ х≠0 и х≠-2
2х²+3х=3х²+2х+6х+4
2х²+3х-3х²-2х-6х-4=0
-х²-5х-4=0
х²+5х+4=0
D=25-16=9
х1=-5-3 /2= -4
х2=-5+3 /2=-1