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Prototep
@Prototep
July 2022
1
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Решите пж.
в) х²- х - 2 = 0
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Trofimkirillov
D=b²-4ac
-1²-4*1(-2)=1-(-8)=9=3²-D
x¹=-b-√D/2a
x²=-b+√D/2a
1-3/2*1=-2/2=-1
1+3/2*1=4/2=2
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Answers & Comments
-1²-4*1(-2)=1-(-8)=9=3²-D
x¹=-b-√D/2a
x²=-b+√D/2a
1-3/2*1=-2/2=-1
1+3/2*1=4/2=2