Simple algebra and square root help.

Click For Summary

Homework Help Overview

The discussion revolves around the concept of square roots, particularly focusing on the square root of negative numbers within the context of algebra. The original poster questions whether a square root exists for a negative number and presents a specific expression involving variables.

Discussion Character

  • Exploratory, Conceptual clarification

Approaches and Questions Raised

  • The original poster attempts to evaluate the square root of a negative number and expresses confusion regarding the lack of a calculator answer. Participants discuss the concept of imaginary numbers and suggest various ways to express the result, including the use of "i" for the square root of -1.

Discussion Status

Participants are exploring the implications of square roots of negative numbers, with some suggesting that the original poster may not be familiar with imaginary numbers. There is a recognition of different ways to express the outcome, but no consensus on a definitive answer has been reached.

Contextual Notes

There is a possibility that the original poster has not yet encountered the concept of imaginary numbers, which may influence their understanding of the problem. The discussion reflects varying interpretations of how to respond to the square root of a negative number.

access
Messages
18
Reaction score
0

Homework Statement


is there no square root for a negative number? is there no solution for this?

q=-1 r=2

the square root of 2q - 5r




The Attempt at a Solution




2x-1 - 5x2 = -12

sqaure root of -12?

my calculator doesn't come up with a answer for the square root.
 
Physics news on Phys.org
It has been a while but they use small i for imaginary numbers if my recollection is correct. i means the square root of -1. So for the purpose of following standard format your answer could be 3.46(i)
 
With the title being "simple algebra," it's possible that the OP has not encountered imaginary numbers yet. In that case, students are usually directed to write "no solution," or "cannot be evaluated" as their answer.
 
Or perhaps "No Real Solution".
 

Similar threads

  • · Replies 21 ·
Replies
21
Views
2K
Replies
3
Views
3K
  • · Replies 12 ·
Replies
12
Views
4K
  • · Replies 8 ·
Replies
8
Views
2K
Replies
9
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 9 ·
Replies
9
Views
3K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 4 ·
Replies
4
Views
3K