CPM Homework Help : PC Problem 10-8

Expand $( 2 x - \frac { 1 } { x } ) ^ { 5 }$ .

Hint 1:

Review the Math Notes box in Lesson 7.2.4.

Hint 2:

The 5th row of Pascal's Triangle is $1\: \:5\:\: 10\:\: 10\:\: 5 \:\:1$ .

Partial answer:

$32x? \:\:? \:\:80x^3 + ...$