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Chapter 1: Q. 1.225 (page 136)

For each number given, identify whether it is a real number or not a real number:

a-196b-81

Short Answer

Expert verified

The solution is a-196not a real number , b-81real number .

Step by step solution

01

Part (a) Step 1. Given information 

Number:-196

02

Part (a) Step 2. Calculation 

There is no real number whose square is -196.

Therefore, -196is not a real number.

03

Part (b) Step 1. Given information 

Number:-81

04

Part (a) Step 2. Calculation 

Since the negative is in front of the radical, -81is -9.

Since-9is a real number,-81is a real number.

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