Answer
$9$
Work Step by Step
To complete the square of $x^2 + 6x$, we add ($\frac{1}{2}b)^2$. Here, the "$b$" corresponds to the second coefficient, $6$. Thus, we have:
$(\frac{1}{2}\times 6)^2=9$.
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 8 - Polar Coordinates; Vectors - Section 8.1 Polar Cordinates - 8.1 Assess Your Understanding - Page 591: 2
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