Algebra: A Combined Approach (4th Edition)

Published by Pearson
ISBN 10: 0321726391
ISBN 13: 978-0-32172-639-1

Chapter 13 - Review - Page 962: 38

Answer

$(-7, -20)$, $(2, 2.5)$

Work Step by Step

$x^2+2y=9$ $5x-2y=5$ $x^2+2y+5x-2y=9+5$ $x^2+5x=14$ $x^2+5x-14=14-14$ $x^2+5x-14=0$ $(x+7)(x-2)=0$ $x+7=0$ $x+7-7=0-7$ $x=-7$ $x-2=0$ $x-2+2=0+2$ $x=2$ $x=-7$ $x^2+2y=9$ $(-7)^2+2y=9$ $49+2y=9$ $49+2y-49=9-49$ $2y=-40$ $2y/2=-40/2$ $y=-20$ $x=2$ $x^2+2y=9$ $2^2+2y=9$ $4+2y=9$ $4+2y-4=9-4$ $2y=5$ $2y/2=5/2$ $y=5/2$
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