How do you combine # (4 - 2i) + (12 + 7i)#? Precalculus Complex Numbers in Trigonometric Form Complex Number Plane 1 Answer mason m Dec 21, 2015 #16+5i# Explanation: Combine like terms. This is just the same as #(4-2x)+(12+7x)#. #(4-2i)+(12+7i)# #=4-2i+12+7i# #=(4+12)+(-2i+7i)# #=16+5i# Answer link Related questions What is the complex number plane? Which vectors define the complex number plane? What is the modulus of a complex number? How do I graph the complex number #3+4i# in the complex plane? How do I graph the complex number #2-3i# in the complex plane? How do I graph the complex number #-4+2i# in the complex plane? How do I graph the number 3 in the complex number plane? How do I graph the number #4i# in the complex number plane? How do I use graphing in the complex plane to add #2+4i# and #5+3i#? How do I use graphing in the complex plane to subtract #3+4i# from #-2+2i#? See all questions in Complex Number Plane Impact of this question 1461 views around the world You can reuse this answer Creative Commons License