PLEASE help me:( i'm desperate (and dumb): factor 2n^(3)+7n^(2)-2n-7

Mathematics

2 answers:

mario62 [17]3 years ago

4 0

$x {}^{2}(2x + 7) - (2x + 7) \\ (2x + 7)(x {}^{2} - 1) \\ (2x + 7)(x - 1)(x + 1)$

Murljashka [212]3 years ago

4 0

2n^(3)+7n^(2)-2n-7

factor by grouping

2n^3 -2n + 7n^2-7

2n(n^2-1) + (7(n^2-1)

factor n^2-1 out

(n^2-1) (2n+7)

factor (n^2-1)

(n-1) (n+1) (2n+7)

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