91n2+n-2

Multiply by 1.

91n2+1n-2

Rewrite 1 as -13 plus 14

91n2+(-13+14)n-2

Apply the distributive property.

91n2-13n+14n-2

91n2-13n+14n-2

Group the first two terms and the last two terms.

(91n2-13n)+14n-2

Factor out the greatest common factor (GCF) from each group.

13n(7n-1)+2(7n-1)

13n(7n-1)+2(7n-1)

Factor the polynomial by factoring out the greatest common factor, 7n-1.

(7n-1)(13n+2)

Factor 91n^2+n-2