Elementary Technical Mathematics

Published by Brooks Cole
ISBN 10: 1285199197
ISBN 13: 978-1-28519-919-1

Chapter 5 - Test - Page 232: 6


$$ -9x^2+5x+11. $$

Work Step by Step

By adding the like $x^2$ terms, we have $$3x^2-9x^2-3x^2=-9x^2$$ and for the $x$ terms, we have $$6x+6x-7x=5x$$ and finally, for the constant terms, we get $$-8+15+4=11$$ Hence the final result is $$ -9x^2+5x+11. $$
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