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pyanoes
@pyanoes
July 2022
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ײ-12=×
помогите пожалуйстааааа!!!!!!!!!!
должно получиться -3;4
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BirdDuo
X²-12=x
x²-x-12=0
по т. В.
x1+x2=1
x1*x2=-12
x1=-3
x2=4
Ответ: x=-3; x=4.
4 votes
Thanks 3
LyubaAlexandorovna
Х²-х-12=0
D=1-4*(-12)=49
х₁,₂=(1±√49)/2=(1±7)/2
x₁=(1-7)/2=-3
x₂=(1+7)/2=4
0 votes
Thanks 0
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Answers & Comments
x²-x-12=0
по т. В.
x1+x2=1
x1*x2=-12
x1=-3
x2=4
Ответ: x=-3; x=4.
D=1-4*(-12)=49
х₁,₂=(1±√49)/2=(1±7)/2
x₁=(1-7)/2=-3
x₂=(1+7)/2=4