Precalculus (6th Edition)

Published by Pearson
ISBN 10: 013421742X
ISBN 13: 978-0-13421-742-0

Chapter 9 - Systems and Matrices - 9.7 Properties of Matrices - 9.7 Exercises - Page 929: 39

Answer

\[\left[ {\begin{array}{*{20}{c}} {5x + y}&y \\ {6x + 2y}&{x + 3y} \end{array}} \right]\]

Work Step by Step

\[\begin{gathered} \left[ {\begin{array}{*{20}{c}} {3x + y}&{ - 2y} \\ {x + 2y}&{3y} \end{array}} \right] + \left[ {\begin{array}{*{20}{c}} {2x}&{3y} \\ {5x}&x \end{array}} \right] \hfill \\ {\text{Add the corresponding elements}} \hfill \\ = \left[ {\begin{array}{*{20}{c}} {3x + y + 2x}&{ - 2y + 3y} \\ {x + 2y + 5x}&{3y + x} \end{array}} \right] \hfill \\ {\text{Simplify}} \hfill \\ = \left[ {\begin{array}{*{20}{c}} {5x + y}&y \\ {6x + 2y}&{x + 3y} \end{array}} \right] \hfill \\ \end{gathered} \]
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