Help 5 questions

Question

Help 5 questions

anonymous · Answer

@nincompoop

anonymous · Answer

I could easily answer but I wouldn't know how to show my work xD wolframalpha.com

anonymous · Answer

I gave you a website to use~

anonymous · Answer

@zepdrix @Nurali @e.mccormick @agent0smith @amistre64 @nubeer @hba

anonymous · Answer

LxairaS.... I GAVE you a website that will give you the answer along with the step by step solution

anonymous · Answer

i couldnt find the correct answer

anonymous · Answer

for which question?

anonymous · Answer

nvm ill get help from @Nurali

anonymous · Answer

for #5: type in "factor 4x^2+5x-6" and it'll give you the direct answer...

anonymous · Answer

@e.mccormick can you help?

e.mccormick · Answer

Well, did you try factoring it?

anonymous · Answer

i think for 1 its 0 or a

e.mccormick · Answer

$4x^2+5x-6 $ starts with a 4.  The factors of 4 are 4 and 1 or 2 and 2.  None of the answers starts with a 2, so you can skip looking at those.

anonymous · Answer

ohh okay 5 is b? i wa stalking about 1 lol

e.mccormick · Answer

It has a negative because the -6 at the end.  

The middle is +5, so the + part must be larger than the negative.  

There is also a formula for finding these but I don't remember it off the top of my head.  However, with just those three pieces of information, I was able to find the factors.

e.mccormick · Answer

Ah, 1.  Hehe.  you were talking about 5 with the other guy.

As for the first two, they are both discriminant problems.  Did you use that part of the quadratic to find it?

anonymous · Answer

let me see if i can figure them out lol ill tell you when im done k :)

e.mccormick · Answer

$b^2-4ac$ is all you need.  From $ax^2+bx+c$ form.

anonymous · Answer

1 is a 0 right ?

anonymous · Answer

@e.mccormick

e.mccormick · Answer

No.

anonymous · Answer

how?

anonymous · Answer

is it 32 right?

anonymous · Answer

i subtraced the 16s when i was supposed to add

anonymous · Answer

@e.mccormick  i think 2 is either b or c

e.mccormick · Answer

$4^2-4(2)(-2) = 16+16=23$ so yah.

e.mccormick · Answer

oops typoed there.  32.

anonymous · Answer

is 2 c 2 irrational solutions?

e.mccormick · Answer

$4^2-4(2)(4) = 16-32 = -16$ Now, the $\sqrt{-16}$ is that irrational, or is there another word for it?

anonymous · Answer

since -16 is not a perfect square?

anonymous · Answer

@e.mccormick ?

e.mccormick · Answer

Goes back to number systems. Look for $\sqrt{-1}$ http://www.mathnstuff.com/math/spoken/here/2class/0/c0pg00.htm

anonymous · Answer

so its complex?

e.mccormick · Answer

Yah, whn a root is negative it is going to make what is called a pair of complex conjugates.  Because of the $\pm$ nature of roots they always come in pairs.

anonymous · Answer

okay for 3 my answer is c for 4 my answer is d for 5 my answer is b am i correct?

e.mccormick · Answer

5 is b.  I have not done the others yet.  Let me look....

anonymous · Answer

k

e.mccormick · Answer

3 yah.

anonymous · Answer

If I give e.mccormick a medal for showing work, will you give me one for answering the questions, lxairaS?

e.mccormick · Answer

4, yah d.

anonymous · Answer

yes give one to @e.mccormick

anonymous · Answer

@e.mccormick  is 3 c @whalexnuker give a medal to @e.mccormick

e.mccormick · Answer

If there is ever a question of me vs someone else getting a medal, don't bother giving me one.  I do not care about medals.

anonymous · Answer

ohh k is 3 c?

e.mccormick · Answer

Yes.  That is what my 3 yah meant.

anonymous · Answer

Thanks @e.mccormick :)

anonymous · Answer

and @whalexnuker tahnks for the help :)