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 1669 views around the world You can reuse this answer Creative Commons License