That would be choice 3
middle term = -3mn-8mn = -11mn and last term = + 2n^2
First,
, and if we multiply
by
we get

Subtracting this from the numerator gives a remainder of

Next,
, and if we multiply
by
we have

and subtracting this from the previous remainder, we end up with a new remainder of

Next,
, and if we multiply
by
we get

Subtracting from the previous remainder, we get a new remainder of

which contains no more factors of
, so we're done.
So,

Answer:
yes they are
Step-by-step explanation:
because the metric system is the same