## College Algebra (11th Edition)

$(3mn + 2)^{2}$
Check factorization with FOIL: $(3mn + 2)^{2}$ = (3mn + 2)(3mn + 2) = $(3mn)^{2}$ + 2(3mn)(2) + $2^{2}$ = 9$m^{2}n^{2}$ + 12mn + 4