Chapter 1, Problem 31CR

To determine

To find: the expression $\left[16-4^2\right]+9$ .

Answer to Problem 31CR

The value of expression is $9$ .

Explanation of Solution

Given:

The expression is $\left[16-4^2\right]+9$ .

Calculation:

The expression is evaluated as follows:

Step1:

Use multiplication two times to find square of 4 as follows:

$\begin{array}{l}\Rightarrow \left[16-4^2\right]+9\\ \Rightarrow \left[16-4\times 4\right]+9\\ \Rightarrow \left[16-16\right]+9\\ \Rightarrow 0+9\end{array}$

Step2:

Use addition as follows:

$\begin{array}{l}\Rightarrow \Rightarrow 0+9\\ \Rightarrow 9\end{array}$

Thus, the value of expression is $9$ .