You can
put this solution on YOUR website!
If it were
jA-10A
then you would factor out the red A, and it would
leave the green j and the green -10
to go in black parentheses like this:
A(j-10)
Therefore since it's
j(k-5)-10(k-5)
then you likewise factor out the red (k-5), and it
leaves the green j and the green -10
to go in black parentheses like this:
(k-5)(j-10)
-----
The only difference is that A doesn't take up
as much space as (k-5). One thing to learn in
algebra is how to treat big chunks of algebra the
same way as you treat little chunks of algebra.
Edwin