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mathhelp23
Group Title
solve
3x^25x11=0
find the x intersepts of f(x)=3x^25x11.
 2 years ago
 2 years ago
mathhelp23 Group Title
solve 3x^25x11=0 find the x intersepts of f(x)=3x^25x11.
 2 years ago
 2 years ago

This Question is Closed

Hero Group TitleBest ResponseYou've already chosen the best response.4
It's not complex
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.4
\[D = b^2  4ac = (5)^2  4(3)(11) = 25 + 132 = 157\]
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.4
\[x = \frac{\pm \sqrt{157} + 5}{6}\]
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
any method ?
 2 years ago

mathhelp23 Group TitleBest ResponseYou've already chosen the best response.0
thank you
 2 years ago

krypton Group TitleBest ResponseYou've already chosen the best response.1
@Hero that's the answer i got,dat's why i called it a complex root
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
@krypton : square root of a negative number gives you a complex number solution
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
any number is complex
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
4 is complex 4i is complex 4+4i is complex
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
why do we have real and complex sets then ?
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
real numbers is a subset of the complex imaginary numbers is a subset of the complex
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
all numbers are complex
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
If a complex number has b = 0, then it is a real number and it lies on the real axis in the complex plane
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
Definition of Complex: \[Complex =\{a+bi  a \in \mathbb{R} , b \in \mathbb{R}\}\]
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.4
Define complex in words only without using mathematical notation.
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.4
What a meant to say is that the discriminant yields a real number, not a complex number. The definition of a complex number is a + bi
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
The real line can be thought of as a part of the complex plane, and correspondingly, complex numbers include real numbers as a special case.
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
... Special Case
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.4
That's good to know. I'm not the one confused about it.
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
Excuse me?
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
I'm not confused either.
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.4
I know you're not myininaya. I never said you were :P
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
def : A complex number is neither purely real nor purely imaginary, but rather is a composite of the two ! Happy everyone ?
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
Ok I guess I just understood you. sorry hero. :)
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
misunderstood you* lol
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
real numbers are complex imaginary numbers are complex real numbers+imaginary numbers are still complex
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.4
she avoided using the word "pure" in her definitions.
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
http://en.wikipedia.org/wiki/Complex_number
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.4
So myininaya, which numbers are purely complex?
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
I don't have a definition for "purely" complex numbers as I never heard of any set of numbers being defined at such sorry
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
check out this book : An imaginary tale The Story of √1 by Paul J. Nahim ( Professor Emeritus of Electrical Engineering at the University of New Hampshire )
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.4
Guess there's no such thing as a pure complex number since it is a "mixture" of pure real and pure imaginary.
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
4 is real 4+0i is complex
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
4/2 is an integer just like 2 is
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
because 4/2=2
 2 years ago

myininaya Group TitleBest ResponseYou've already chosen the best response.0
@jamesj @zarkon
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.4
Why are you two reciting stuff you already know? Because I already know this stuff
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
dw:1331351848500:dw
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
this is interesting ... LOL
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.4
mathg8, I guess you really want krypton to understand
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
I just never heard this before ... so it is interesting ( not wrong or right ) just interesting ...
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
real numbers are complex ( i meant this statement )
 2 years ago

krypton Group TitleBest ResponseYou've already chosen the best response.1
lol intresting :)
 2 years ago

Hero Group TitleBest ResponseYou've already chosen the best response.4
Krypton, I'm sure you enjoyed this
 2 years ago

krypton Group TitleBest ResponseYou've already chosen the best response.1
lol yeah! alot,just woke up from sleep and logged in,only to find some argument in here.was fun :)
 2 years ago

mathg8 Group TitleBest ResponseYou've already chosen the best response.1
yes ... this was fun!
 2 years ago
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