Question

ab-mn+an-bm factorise this

Answer 1

ab-mn+an-bm
=ab-bm+an-mn
=b(a-m) +n(a-m)
=(a-m) (b+n)

HOPE IT WILL HELP

Answer 2

hey there !!

$= > ab - mn + an - bm \\ = > ab + an - mn - bm \\ = > a(b + n) - m(n + b) \\ = > (b + n)(a - m)$
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