Answer
x + y = 1 provided x is not equal to y
Work Step by Step
the equation is simplified by splitting (x^{2}+y^{2}) into (x-y) (x+y) then the (x-y) from the numerator and denominator can cancel leaving the answer. see photo for further work.
Linear Algebra: A Modern Introduction
by Poole, David
Published by
Cengage Learning
ISBN 10:
1285463242
ISBN 13:
978-1-28546-324-7
Chapter 2 - Systems of Linear Equations - 2.1 Introduction to Systems of Linear Equations - Exercises 2.1 - Page 63: 8
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