Expression 56k³ - 84k² + 70k - 105 can be simplified to: 7(8k³ - 12k² + 10k - 15)
8k³ - 12k² + 10k - 15 is a third degree expression. it will be factorised to:
(k - 1.5)(k + 2.2)²
Finally expression 56k³ - 84k² + 70k - 105 can be simplified to: 7(k - 1.5)(k + 2.2)²
Good luck
