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sweetdream55
@sweetdream55
November 2021
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Разложите на множители выражение
1. 4y^2 - (1+y)^2
а) (3y - 1)(3y + 1)
б) (y - 1)(3y + 1)
в) (y - 1)^2
г) (3y - 1)^2
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Answers & Comments
Valera1107
4*y^2-(1+y)^2=4*y^2-(1+2*y+y*2)=4*y^2-1-2*y-y^2=3*y^2-2*y-1.
б)
(y - 1)(3y + 1)=3*y^2+y-3*y-1=3*y^2-2*y-1.
Ответ:б.
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Answers & Comments
б)(y - 1)(3y + 1)=3*y^2+y-3*y-1=3*y^2-2*y-1.
Ответ:б.