Can anyone help me with this algebra 2?

Question

it is factoring

1.a^2-3ab-130b^2

2.m^6+9m^3-10

3.xy+yz-xw-wz

Answer 1

1. = (a-b)^2-ab

3  = (x+z)(y-w)

2 - I've given it a second thought = m^6 + 10m^3 - m^3 - 10 =

= m^3 * (m^3 + 10) - (m^3 + 10) = (m^3 - 1)*(m^3 + 10)