Algebra and Trigonometry 10th Edition

Published by Cengage Learning
ISBN 10: 9781337271172
ISBN 13: 978-1-33727-117-2

Chapter 11 - 11.5 - The Binomial Theorem - 11.5 Exercises - Page 813: 54



Work Step by Step

According to the Binomial Theorem, the 9th, that is, the ($8+1$)th term of $(z^2-y)^{10}$ is: $_{10}C_8(z^2)^{10-8}(-t)^8=\frac{10!}{(10-8)!\times8!}z^4t^8=45z^4t^8$ $az^4t^8=45z^4t^8$ $a=45$
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