Question

i needed to edit this question :p

Answer 1

Just split 13x into two terms such that sum is 13 and product is 42 and then take common

Answer 2

One moment, I need to set up the equation :)

Answer 3

\[x^{2}+13 x+42\] We need to go through the factors of 42 (numbers by which 42 can be divided) until we find the two lowest ones that add to 13.
The factors of 42:\[1,2,3,4,6,7\]And we'll just stop here, because \[7+6=13\]
So, \[x^{2}+13 x+42 = (x+7) (x+6)\]

Answer 4

No problem