Chapter 1: Q 138. (page 39)

In the following exercises, evaluate the following expressions.
$r^{2} - s^{2} when r = 12, s = 5$

Short Answer

Expert verified

The required value is 119.

Step by step solution

Step 1. Given information.

The given expression is:

$r^{2} - s^{2}$

We have to evaluate the given expression for $r = 12 and s = 5$ .

To evaluate an expression means to find the value of the expression when the variable is replaced by a given number.

Step 2. Replace r with 12 and s with 5 in the given expression.

$r^{2} - s^{2} = 12^{2} - 5^{2}$

Follow the order of operations,

$= 12 \cdot 12 - 5 \cdot 5 = 144 - 25 = 119$

The value of $r^{2} - s^{2} when r = 12, s = 5$ is 119.

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In the following exercises, evaluate the following expressions.
$r^{2} - s^{2} when r = 12, s = 5$

Short Answer

Step by step solution

Step 1. Given information.

Step 2. Replace r with 12 and s with 5 in the given expression.

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In the following exercises, evaluate the following expressions.r2-s2whenr=12,s=5

Short Answer

Step by step solution

Step 1. Given information.

Step 2. Replace r with 12 and s with 5 in the given expression.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Theoretical and Mathematical Physics

Logic and Functions

Mechanics Maths

Applied Mathematics

Pure Maths

Probability and Statistics

Study anywhere. Anytime. Across all devices.

In the following exercises, evaluate the following expressions.
$r^{2} - s^{2} when r = 12, s = 5$