Answer
$-2x_{1}x_{2}(m_{1}m_{2}+1)=0$
Work Step by Step
$-2m_{1}m_{2}x_{1}x_{2}-2x_{1}x_{2}=0$
We are asked to factor out $-2x_1x_2$:
$-2x_{1}x_{2}(m_{1}m_{2}+1)=0$
College Algebra (11th Edition)
by Lial, Margaret L.; Hornsby John; Schneider, David I.; Daniels, Callie
Published by
Pearson
ISBN 10:
0321671791
ISBN 13:
978-0-32167-179-0
Chapter 2 - Section 2.5 - Equations of Lines and Linear Models - 2.5 Exercises - Page 230: 73
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