--------- = ? , for x ≠ 81

x² - 81

A.) x - 9

-------

x + 9

B.) 1

------

x - 9

C.) 1

-------

x + 9

D.) - 1/9

E.) 1/9

**(x - 9)²**

--------- = ? , for x ≠ 81

x² - 81

--------- = ? , for x ≠ 81

x² - 81

(x - 9)(x - 9)

---------------- {factored numerator and denominator, denominator was a difference of two squares}

(x + 9)(x - 9)

x - 9

-----

x + 9

**A.)**

*- Algebra House*