Precalculus (6th Edition) Blitzer

Published by Pearson
ISBN 10: 0-13446-914-3
ISBN 13: 978-0-13446-914-0

Chapter P - Section P.7 - Equations - Exercise Set - Page 108: 156


See table P5 "Determining the Most Efficient Technique to Use when Solving a Quadratic Equation" (sample answer follows) The given equation is $ ax^{2}+bx+c=0$. First, see if a term is missing, $ bx $ or $ c.$ The factoring (c missing) or square-root property (bx is missing) methods lead to a quick solution. If not, you look to factor $ ax^{2}+bx+c $. This is easier when a=1, and slightly more complicated when $ a\neq 1.$ If factoring does not seem easy, maybe the leading coefficient a is a perfect square. Then, try the complete-the-square method. If all else fails, we can use the quadratic formula. We can always use the quadratic formula.

Work Step by Step

Given above.
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