# Math Help - factorising

1. ## factorising

anybody know how to factorise this equasion?

k2L2-mnL-k2L+mn

k2and L2 shold read K and L squared but dont know how to write this on the computer

2. Originally Posted by bart 1000
anybody know how to factorise this equasion?

k2L2-mnL-k2L+mn
$k^2L^2 - mnL - k^2L + mn$

begin by grouping terms that have things in common

$k^2L^2 - k^2L + mn - mnL$

factor out the like terms by groups

$k^2L(L - 1) + mn(1 - L)$

factor out -1 from (1 - L)

$k^2L(L - 1) - mn(L - 1)$

now what?

k2and L2 shold read K and L squared but dont know how to write this on the computer
you could type k^2 and L^2 respectively

3. thanks for help

4. Originally Posted by bart 1000
thanks for help
i hope you know i wasn't finished... i left it to you to do the last step

5. think its (K^2L-mn)(L-L)?

6. Originally Posted by bart 1000
think its (K^2L-mn)(L-L)?
i suppose you meant (K^2L - mn)(L - 1)