Answer
$2r^2-7rs+3rt+3s^2-4st+t^2$
Work Step by Step
$(r-3s+t)(2r-s+t)=r(2r-s+t)-3s(2r-s+t)+t(2r-s+t)=2r^2-rs+rt-6rs+3s^2-3st+2rt-st+t^2=2r^2-7rs+3rt+3s^2-4st+t^2$
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 R - Review of Basic Concepts - R.3 Polynomials - R.3 Exercises - Page 33: 64
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