Elementary Linear Algebra 7th Edition

Published by Cengage Learning
ISBN 10: 1-13311-087-8
ISBN 13: 978-1-13311-087-3

Chapter 3 - Determinants - Review Exercises - Page 140: 70

Answer

the equation of the plane is $$7x+13y-z=0.$$

Work Step by Step

The equation of the plane is given by $$ \left|\begin{array}{rrr}{x} & {y} & {z}&{1} \\ {0} & {0} & {0}&{1}\\{2} & {-1} & {1}&{1} \\{-3}&{2}&{5}&{1}\end{array}\right|= 0. $$ So, we have $$ \left|\begin{array}{rrr}{x} & {y} & {z}&{1} \\ {0} & {0} & {0}&{1}\\ {2} & {-1} & {1}&{1} \\{-3}&{2}&{5}&{1}\end{array}\right|= \left|\begin{array}{rrr}{x} & {y} & {z} \\ {2} & {-1} & {1} \\{-3}&{2}&{5} \end{array}\right|=x(-5-2)-y(10+3)+z(4-3)=-7x-13y+z=0. $$ Hence, the equation of the plane is $$7x+13y-z=0.$$
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