College Algebra (10th Edition)

Published by Pearson
ISBN 10: 0321979478
ISBN 13: 978-0-32197-947-6

Chapter 7 - Section 7.2 - The Parabola - 7.2 Assess Your Understanding - Page 514: 2


To complete the square of $x^2-4x$, add $4$.

Work Step by Step

To complete the square of $x^2-4x$, we must add half of the coefficient of x and square it. So, we would have: $(\frac{1}{2}\cdot-4)^2$ =$(-2)^2$ =$4$ To complete the square of $x^2-4x$, add $4$.
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