Precalculus (6th Edition) Blitzer

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

Chapter 7 - Review Exercises - Page 877: 29


$(-2,-2)$, $(2,2)$

Work Step by Step

Re-arrange the given two equations and then use the substitution method to get $y-x=0 \implies y=x$ Now, $x(x)-4 =0$ This gives: $x^2=4 \implies x=2,-2$ when $x=2$ then we have $y =2$ when $x=-2$ then we have $y =-2$ Hence, our answers are: $(-2,-2)$, $(2,2)$
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