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Intermediate Algebra

OPENSTAX

$Math Studyset 91影视 Explanations$ Math

OER 2017 Edition 路 1346 pages

ISBN: 9780998625720

Chapter 12: Q. 193E (page 1213)

In the following exercises, expand each binomial using Pascal's Triangle.
$(a + b)^{8}$

Short Answer

Expert verified

Expansion is $a^{8} + 8 a^{7} b + 28 a^{6} b^{2} + 56 a^{5} b^{3} + 70 a^{4} b^{4} + 56 a^{3} b^{5} + 28 a^{2} b^{6} + 8 a b^{7} + b^{8}$

Step by step solution

01

Given Information

Expand binomial using Pascal's Triangle.

$(a + b)^{8}$

02

Solution

We have

Here the exponent is 8 hence we need to consider ninth row

The expansion is

$(a + b)^{8} = 1 a^{8} + 8 a^{7} b + 28 a^{6} b^{2} + 56 a^{5} b^{3} + 70 a^{4} b^{4} + 56 a^{3} b^{5} + 28 a^{2} b^{6} + 8 a b^{7} + 1 b^{8} = a^{8} + 8 a^{7} b + 28 a^{6} b^{2} + 56 a^{5} b^{3} + 70 a^{4} b^{4} + 56 a^{3} b^{5} + 28 a^{2} b^{6} + 8 a b^{7} + b^{8}$

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