Chapter 8.4, Problem 38P

Simplify each product.

$(f-18)(f+18)$

To determine

To simplify: The product $\left(f-18\right)\left(f+18\right)$ .

Answer to Problem 38P

  $f^2-\text{324}$

Explanation of Solution

Given information:

The expression is $\left(f-18\right)\left(f+18\right)$ .

Calculation:

Use the difference of squares that is., $\left(x+y\right)\left(x-y\right)=x^2-y^2$

  $\begin{array}{c}\left(f-18\right)\left(f+18\right)=f^2-{18}^2\\ =f^2-\text{324}\end{array}$