How do you factor #qs-11s+qf-11f#?
1 Answer
May 23, 2016
(q - 11)(s + f)
Explanation:
Group the terms into 'pairs'
thus [qs - 11s ] + [qf - 11f)
now factorise each pair.
hence : s(q - 11) + f(q - 11)
There is now a common factor of (q - 11) which can be taken out.
hence : (q - 11)(s + f)
