Chapter 8.4, Problem 29PPE

To determine

To simplify the product $\left(10+y\right)\left(10-y\right)$ .

Answer to Problem 29PPE

  $\left(10+y\right)\left(10-y\right)=100-y^2$

Explanation of Solution

Given:

  $\left(10+y\right)\left(10-y\right)$

Concept used:

  $\left(a+b\right)\left(a-b\right)=a^2-b^2$

Calculation:

  $\begin{array}{l}\left(10+y\right)\left(10-y\right)={10}^2-y^2\\ =100-y^2\end{array}$