Answer
$-2x_1x_2(m_1m_2+1)=0$
Work Step by Step
From the previous result: $-2m_1m_2x_1x_2-2x_1x_2=0$, we have $-2x_1x_2(m_1m_2+1)=0$
Precalculus (6th Edition)
by Lial, Margaret L.; Hornsby, John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
013421742X
ISBN 13:
978-0-13421-742-0
Chapter 2 - Graphs and Functions - 2.5 Equations of Lines and Linear Models - 2.5 Exercises - Page 247: 83
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