Which best explains or justifies step 2

The polynomial in its standard form is:

The student's first step is:

The student's second step is:

The student's second step is to factor the remaining binomial on the right side of the equation.

In this case, the student made a common factor of the letter a.

The sentence that best explains or justifies Step 2 is:

factoring the binomial

to find the unit price, we must figure out the cost of one item (in this case one dish towel).   to do this, we divide the total price ($7.92) by the number of items bought (for this problem it is 8, because there are eight dish towels in one pack).  

$7.92/8 = $0.99

therefore, the unit price, or the price of one dish towel, is $0.99.

hope this !

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step-by-step explanation: