Answer:
Given:
1).
divided by 
⇒ 
⇒ 
By factorising numerator by using identity, 
⇒ 
⇒ 
⇒
<u> {Answer}</u>
2).
divided by 
⇒ 
⇒
⇒ <u>
</u> <u>{ Answer}</u>
The answer to your question is k and m are both 9
To find Jackson's height, you subtract 9 from 63 which gives you 54. 63-9=54