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help1please
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If I see an expression like
[tex]\sqrt{E^2c^2}[/tex]
I can just remove the square root sign right and replace it with Ec?
help1please said:If I see an expression like
[tex]\sqrt{E^2c^2}[/tex]
I can just remove the square root sign right and replace it with Ec?
I can just remove the square root sign right and replace it with Ec?
That is incorrect. Here's an example why.Ratch said:help1please,
I would say yes you can. Once a expression is squared, it loses its signed identity.
IOW, if you square a negative number, and then take the square root, you don't get the negative number back.
That's not what you told the OP.Ratch said:Mark44,
Correct, that is what I am averring. I am saying it loses its sign identity after it is squared.
help1please said:I can just remove the square root sign right and replace it with Ec?
Ratch said:I would say yes you can. Once a expression is squared, it loses its signed identity.
Re: A very quick stupid question
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Originally Posted by Ratch
Mark44,
Correct, that is what I am averring. I am saying it loses its sign identity after it is squared.
That's not what you told the OP.
So what you are telling the OP is that
Yes, I saw post #5, and that is what I'm objecting to.Ratch said:Mark44,
That is exactly what I told the OP. See post #5.
IOW, help1please is asking if ##\sqrt{E^2c^2} = Ec##help1please said:I can just remove the square root sign right and replace it with Ec?
Ratch said:I would say yes you can. Once a expression is squared, it loses its signed identity.
Well, I agree with that, but that isn't what you said before. Your previous response had no mention of absolute values.Ratch said:No, I am saying that √(E^2*C^2) = |E*C|
A square root is a number that, when multiplied by itself, gives the original number. For example, the square root of 9 is 3, because 3 multiplied by itself equals 9.
The square root of a number is the number that, when squared, gives the original number. The square of a number is the result of multiplying the number by itself. For example, the square root of 9 is 3, and the square of 3 is 9.
No, the square root of a negative number is not a real number. The square root of a negative number is called an imaginary number, denoted by the letter "i".
The principal square root is the positive square root of a number. For example, the principal square root of 9 is 3. The negative square root is the negative version of the principal square root. So, the negative square root of 9 is -3.
To simplify a square root, you can factor the number into smaller numbers and take the square root of each individual factor. For example, to simplify the square root of 12, you can factor it into 4 and 3, and then take the square root of each factor separately, giving you √4 * √3, which simplifies to 2√3.