algebra
posted by kiddo .
Find the sum in simplest form.
7mn + 5m^2 + 3n^2 + 2mn
a) 15m^2n^2 + 9mn
b) 7mn + 5m^2 +3n^2 + 2mn
c) 15m^2n^2 + 9m^2n^2
d) 5m^2 +3n^2 + 9mn

i think i figure out this answer myself its d but i could be wrong

d is it
the 2 and the 7 mn s are all the like terms you can combine 
(−5m + 7mn) − (2mn + 7m)