Mathematics, 19.09.2019 23:00, limelight11

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in which expression is the coefficient of the n term -1?
a)
3n2 + 4n -1
b)
-3n2 + 5n + 4
c)
-2n - n + 5
d)
4n2 + n - 5

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in which expression is the coefficient of the n term -1?
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