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AnikaBergman
@AnikaBergman
July 2022
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PAIN0202
1) 2x^2 - 18=0 6x-3x^2=0! * (-1)
2x^2=18 3x^2-6x=0
x^2=9 D= 36 √D=6
x=3 x1= 6+6/6=12/6=2
x2- нет решения
2) a D=(-2)^2 -4*1*(-3)=4+12=16
√D=4
x1=2+4/2=6/2=3
x2=2-4/2=-2/2=-1
б) D= (-6)^2 -4*1*9=36-36=0 корней нет
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Answers & Comments
2x^2=18 3x^2-6x=0
x^2=9 D= 36 √D=6
x=3 x1= 6+6/6=12/6=2
x2- нет решения
2) a D=(-2)^2 -4*1*(-3)=4+12=16 √D=4
x1=2+4/2=6/2=3
x2=2-4/2=-2/2=-1
б) D= (-6)^2 -4*1*9=36-36=0 корней нет