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Mira1111
@Mira1111
July 2022
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разложить на множители квадратный трехчлен x²+7x-8
а) (x-8)(x+1)
б) (x+8)(x-1)
в) (x-1)(x-8)
г) (x+8(x+1)
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русская25
X² + 7x - 8 =
(x-1)(x+8)
x² + 7x - 8 = 0
D= 49 + 32 = 81
x₁ = (-7+9)/2 = 2/2=1
x₂= (-7-9)/2= -8
5 votes
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Answers & Comments
x² + 7x - 8 = 0
D= 49 + 32 = 81
x₁ = (-7+9)/2 = 2/2=1
x₂= (-7-9)/2= -8