Question

a^2-2ab-15b^2 factor completly please ^ this means square

Answer 1

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

Answer 2

\[a^2-5ab+3ab-15b^2\]

Answer 3

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

1*15=15
5*3=15

the most probably set is 3*5

since -5+3=-2
and -5*3=-15 so the solution is (a-5b)(a+3b)