### Intermediate Algebra

10th Edition
Jerome E. Kaufmann + 1 other
Publisher: Cengage Learning
ISBN: 9781285195728

Chapter
Section

### Intermediate Algebra

10th Edition
Jerome E. Kaufmann + 1 other
Publisher: Cengage Learning
ISBN: 9781285195728
Chapter A, Problem 19PE
Textbook Problem
1 views

## For Problems 7-20, expand and simplify. ( x − 3 ) 4

To determine

To expand:

(x3)4.

### Explanation of Solution

Let y=3.

The binomial expansion for (x+y)n is

xn+nxn1y+n(n1)2!.xn2y2+n(n1)(n2)3!xn3y3+........+yn

The exponents of x begin with the exponent of 4 and decrease term by term by 1 until the last term becomes 1, i.e. the exponent of x is 0.

The exponents of y begin with 0 and increase term by term by 1 until the last term contains the power of 4.

Therefore,

(x3)4=x4+4x3(3)+432!x2(3)2+4323!x(3)3+(3)4</

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