Check my work: Which of the following is the conjugate of a complex number with 2 as the real part and −4 as the imaginary part?

Question

anonymous · Answer

I know 2 is on the left side and -4 is on the right side (I believe so). But how am I to know the conjugate if it doesn't give it to me...? would it automatically be addition so the conjugate is subtraction?

anonymous · Answer

._. anyone?

anonymous · Answer

@Hero @Directrix @Callisto @BulletWithButterflyWings @e.mccormick

e.mccormick · Answer

http://mathworld.wolfram.com/ComplexConjugate.html http://www.mathwords.com/c/complex_conjugate.htm The part with an i changes sign.

anonymous · Answer

I've already answered this question.
I know what conjugates are, I said that. You didn't provide me anything helpful

e.mccormick · Answer

You state "I know 2 is on the left side and -4 is on the right side (I believe so)." which means $2-4i$, OK.  "But how am I to know the conjugate if it doesn't give it to me...? would it automatically be addition so the conjugate is subtraction?" after saying the original is $2-4i$, you claim it is addition?  Those statements contradict each other.  $2-4i$ is subtraction, not addition.  If it is already subtraction, the complex conjugate is addition.  

That is why I gave links, because you made contradictory statements.

If you already answered it, why leave it open?  If you are going to be a jerk about things, don't bother tagging me.  I am not saying you have to be polite or even grateful, but you could have just said, "Already figured it out," closed it, and left it at that.

hero · Answer

In general, if you are given $a - bi$, where a is the real part and b is the imaginary part, then the conjugate will be $a + bi$

anonymous · Answer

@Hero That's what I was looking for, thanks. I didn't know it was a-bi. That's the only thing I needed to know.

e.mccormick · Answer

You tell me: "I know what conjugates are, I said that. You didn't provide me anything helpful" but you tell Hero "That's what I was looking for, thanks. I didn't know it was a-bi. That's the only thing I needed to know."

Exactly what he told you is on the pages I linked, so he gave you the same information I did, just in a different form.

If you are not willing to look at references: never, ever tag me.  That is generally what I give people.  The references they need to learn for themselves.

anonymous · Answer

@e.mccormick Quit being so defensive O.o You provided me links I didn't need (and they weren't helpful). I was asking for the original formula (it was asked indirectly) which is a-bi. I left the question open because it didn't matter. It was WAY down the list and you'd have to scroll a long way to get to the question. I don't normally click "close question" just because it doesn't matter. Stating again, you provided me links I DIDN'T NEED (AND THEY WEREN'T HELPFUL). All I needed was the formula. I wasn't looking to read two whole web pages. All I needed was "a-bi". I now know to put you on a block list so I know not to tag you. You're not a helpful user, sorry. I have my own lesson that tells me what conjugates are (I stated I know what they are), but I needed the formula that it lacked to give. I clicked your links, but I didn't bother to read them because it wasn't necessary. I looked at them thoroughly and I see you've given me the same answer but it would have been just as simple to put "a-bi". That way you could get the medal instead of Hero. You're getting butthurt way too easily.

e.mccormick · Answer

As for my answer being worthless, if it is, then so was Hero's. First line of http://www.mathwords.com/c/complex_conjugate.htm : The complex conjugate of a + bi is a – bi, and similarly the complex conjugate of a – bi is a + bi. Hero: In general, if you are given a−bi, where a is the real part and b is the imaginary part, then the conjugate will be a+bi They say the SAME THING. If that link is not helpful, then what Hero said is not helpful. Stop lying and just admit you did not actually read the links OR you just looked at the Wolfram one, which yes, I admit, I probably could have put second. The Wolfram one is more technical and the Mathwords one more explanatory, which was why I used both. You do not know the difference between defensive and assertive. I have proven that you were to lazy to read the page and I am calling you out on it. That is being assertive. Your claiming that what I provided was worthless when it is actually exactly the same information is a great example of being defensive. If you want to know more on the differences between assertive and defensive I recommend "Human Relations in Organizations" by Lussier or "Interplay: The Process of Interpersonal Communication" by Adler, Rosenfeld and Proctor. They will both give you examples of why what I am doing is assertive and instructive and what you are doing is being lazy and trying to improperly defend it. You have not read the Code of Conduct or adhere to it, or you would realize that what I am doing, showing you how to learn, is the stated goal of the site. I am not hurt. I am informing you of the policies of the site. These are some of the rules you agreed to follow: http://openstudy.com/code-of-conduct Be Nice: I will stay positive, be friendly, and not mean Give Help, Not Answers: I will encourage and guide those needing help, and not just give them an answer Thank Others for Their Help: I will thank people for taking the time and effort to help me Follow them or find somewhere else to study. It is really that simple. Oh, and as for medals, I do not care about them. I have posted that many times and told people to give others the medals. To me: medals mean nothing.

anonymous · Answer

tl;dr. Okay.