I am so stuck on this factoring thing. how do you solve:

Question

1)15a(squared)b-10ab(squared)
2)x(squared)-8x-8
3) 6p(squared)-17p-45
4)2r(cubed)+250
5)x(to the 6th power)-64
6)x(squared)-xy+2x-2y
7)x(to 4th power)-1

Answer 1

I will do some, then you try.

1. 15a^2 b-10ab^2 factor out 5 ab

5ab(3a-2b)

4. 2r^3+250
2(r^3+125) you have a formula for factoring sum of cubes..
2(r+5)(r^2+5r+25) check that.