How do you simplify #(25+15i)-(25-6i)# and write the complex number in standard form? Precalculus Complex Numbers in Trigonometric Form Complex Number Plane 1 Answer Serena D. May 4, 2018 #21i# Explanation: Standard form: #a+bi rarr a# is real #(25+15i)-(25-6i) rarr# Distribute the negative #25+15i-25-(-6i)# #25+15i-25+6i rarr# Combine like terms #0+21i# #21i# 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 1738 views around the world You can reuse this answer Creative Commons License