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2003beriozina
@2003beriozina
August 2022
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Решите уравнения
3x^2=2x+4
(x-1)(2x+3)=-2
x^2+7/2=4x
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sedinalana
Verified answer
1
3x²-2x-4=0
D=4+48=52
x1=(2-2√13)/6=(1-√13)/3
x2=(1+√13)/3
2
2x²+3x-2x-3+2=0
2x²+x-1=0
D=1+8=9
x1=(-1-3)/4=-1
x2=(-1+3)/4=1/2
3
x²+7=8x
x²-8x+7=0
x1+x2=8 U x1*x2=7
x1=1 U x2=7
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Answers & Comments
Verified answer
13x²-2x-4=0
D=4+48=52
x1=(2-2√13)/6=(1-√13)/3
x2=(1+√13)/3
2
2x²+3x-2x-3+2=0
2x²+x-1=0
D=1+8=9
x1=(-1-3)/4=-1
x2=(-1+3)/4=1/2
3
x²+7=8x
x²-8x+7=0
x1+x2=8 U x1*x2=7
x1=1 U x2=7