EASY 25 POINTS

Please help me with this math problem it is due tomorrow.

Write the expression 7x^3-28xy^2 as the product of 3 factors

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k

Using inductive reasoning, what is the next two numbers in this set? 1,-7,13,-19 i got the numbers 14,-26 is that right?