# Chapter 1 - 1.5 - Complex Numbers - 1.5 Exercises - Page 120: 89

False.

#### Work Step by Step

$(a+bi)+(s+ti)=(a+s)+(b+t)i$ $(a+s)+(b+t)i$ is a real number if $b+t=0$, that is, if $b=-t$. But in most cases, this does not happen.

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