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Luba2109
@Luba2109
July 2022
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х^2-2х-3 разложите пожалуйста
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nektar99
D=b^2-4ac=(-2)^2-4*1*(-3)= 16
x1= (-b+
√D)/2a= -(-2)+4/2*1=3
x2=
(-b-
√D)/2a= -(-2)-4/2*1=-1
a ( x – x1
) ( x – x
2
) =
a ( x – 3
) ( x + 1
)
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Answers & Comments
x1= (-b+√D)/2a= -(-2)+4/2*1=3
x2=(-b-√D)/2a= -(-2)-4/2*1=-1
a ( x – x1 ) ( x – x2 ) = a ( x – 3) ( x + 1)