#### Answer

$$12x^{4}-20x^{3}+36x^{2}$$

#### Work Step by Step

Distribute $4x^{2}:$
$$4x^{2}(3x^{2}-5x+9)=$$
$$4x^{2}(3x^{2})-4x^{2}(5x)+4x^{2}(9)=$$
$$12x^{4}-20x^{3}+36x^{2}.$$

Published by
Prentice Hall

ISBN 10:
0133186024

ISBN 13:
978-0-13318-602-4

$$12x^{4}-20x^{3}+36x^{2}$$

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