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CailaYork
@CailaYork
July 2022
1
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Вроде не сложно но вроде и не легко
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тто
1) 2х^2-х-1=х^2-5х-(-1-х^2)
2х^2-х-1=х^2-5х+1+х^2
2х^2-х-1=2х^2-5х+1
-х-1=-5х+1
-х+5х=1+1
4х=2
х=0,5
2) 4х^2-20х=0
4х*(х-5)=0
х*(х-5)=0
х1=0
х-5=0
х2=5
3)(-5х+3)*(-х+6)=0
-5х+3=0
х1=3/5
-х+6=0
х2=6
4)(-4х-3)*(х-3)=0
-4х-3=0
х1=-3/4
х-3=0
х2=3
2 votes
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Answers & Comments
2х^2-х-1=х^2-5х+1+х^2
2х^2-х-1=2х^2-5х+1
-х-1=-5х+1
-х+5х=1+1
4х=2
х=0,5
2) 4х^2-20х=0
4х*(х-5)=0
х*(х-5)=0
х1=0
х-5=0
х2=5
3)(-5х+3)*(-х+6)=0
-5х+3=0
х1=3/5
-х+6=0
х2=6
4)(-4х-3)*(х-3)=0
-4х-3=0
х1=-3/4
х-3=0
х2=3