Will mark brainliest, need this done asap! Factor each polynomial completely.

Answer:
1) Taking 10xy we get
=10xy(x^4-4y^2)
2) Taking ab common
=ab(a^4-64)
3) Taking 2 common
=2(125m^3+27)
4) k^4-10k^2-39
=k^4-13k^2+3k^2-39
=k^2(k^2-13)+3(k^2-13)
=(k^2+3)(k^2-13)
5) 4w^4+10w^2+6w^2+15
=2w^2(2w^2+5)+3(2w^2+5)
=(2w^2+5)(2w^2+3)
6) 2n^3+7n^2-2n-7
=n^2(2n+7)-1(2n+7)
=(n^2-1)(2n+7)
Hope this helps