Question

Double-check this
l^2-9l=l(l-9) {those are the letter l)
Or is it 1(1-9)?
MEDAL REWARDED!!

Answer 1

@jim_thompson5910
@Mertsj

Answer 2

@mathmale

Answer 3

\[\ell^2-9\ell=\ell\times\ell-9\times\ell=\ell(\ell-9)\] yes

Answer 4

Thanks!