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ManagerStreet
@ManagerStreet
December 2021
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Anechka20112015
1) 3(x-1)=2(4+2x)
3x-3=8+4x
-x=11
x=11
2) 6x^2+1=5x
6x^2-5x+1=0
D=25-4×6= 1
x=(5+1)/12=0.5
3) x^2+4x+3x=3x+12
x^2+4x-12=0
D= 16-4(-12)= 64; √64=8
x1=(-4+8)/2=2
x2=(-4-8)/2=-6
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Answers & Comments
3x-3=8+4x
-x=11
x=11
2) 6x^2+1=5x
6x^2-5x+1=0
D=25-4×6= 1
x=(5+1)/12=0.5
3) x^2+4x+3x=3x+12
x^2+4x-12=0
D= 16-4(-12)= 64; √64=8
x1=(-4+8)/2=2
x2=(-4-8)/2=-6