Answer
$9x^{3}+30x^{2}+12x-24$
Work Step by Step
$(3x^{2}+4x-4)(3x+6)$
Multiplying vertically,
$=6(3x^{2}+4x-4)+3x(3x^{2}+4x-4)$
$=18x^{2}+24x-24+9x^{3}+12x^{2}-12x$
Combine like terms.
$=9x^{3}+30x^{2}+12x-24$
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 5 - Section 5.4 - Multiplying Polynomials - Exercise Set - Page 289: 71
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