Answer
$(5,2)$
Work Step by Step
1. From the 2nd equation, we get $y=7-x$
2. Use the above in the 1st equation, we have $x^2-(7-x)^2=21$ or $14x-49=21$, thus $x=5$
3. Use the above with the 2nd equation to get the solution $(5,2)$
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (3rd Edition)
by Sullivan III, Michael
Published by
Pearson
ISBN 10:
0-32193-104-1
ISBN 13:
978-0-32193-104-7
Chapter 10 - Systems of Equations and Inequalities - Section 10.6 Systems of Nonlinear Equations - 10.6 Assess Your Understanding - Page 794: 26
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