# factoring

posted by
**lelani** on
.

a^2-2ab-15b^2

a^2-2ab-15b^2 =

(a - b)^2 - 16 b^2 =

[a - b + 4 b]* [a - b - 4b] =

(a + 3b)*(a - 5b)

posted by
**lelani** on
.

a^2-2ab-15b^2

a^2-2ab-15b^2 =

(a - b)^2 - 16 b^2 =

[a - b + 4 b]* [a - b - 4b] =

(a + 3b)*(a - 5b)