Complex number conjugate: Barrons error?

Archive SAT Subject Test Preparation
1

<p>Barrons says that when graphing complex numbers x is the real part while y is the imaginary part. </p>

<p>They then say that the conjugate of an imaginary number a+bi is a-bi and is a reflection about the y axis. </p>

<p>If bi (the imaginary part) is the y value, why would it reflect about the y axis? </p>

<p>wouldn’t -bi be a reflection about the x axis since a-bi = (x,-y)</p>

2

<p>Yes I noticed that error too. It is a reflection about the x-axis.</p>

3

<p>There are so many errors in this book…</p>