Talk:Quadratic equation
From Academic Kids
In school, I've been taught to solve quadratic equations by writing them on the form
<math>x^2 + bx + c = 0<math>
and using the formula
<math>x = - \frac{b}{2} \pm \sqrt{\,\frac{b^2}{4}-c }<math>
(which is the same as the quadratic formula but simplified for the special case of a = 1).
This always seemed to make more sense to me. Perhaps just because I'm all backwards but used to it? ;)
Is this method worth mentioning here? Fredrik (talk) 08:47, 8 Jun 2004 (UTC)
Actually, I've never seen it done that way before. I'm still in 8th grade, and I'm reviewing the quadratic formula for the upcoming EOC's, btw.
I believe the last bit of it (the square root of the fraction) can be simplified. I also remember hearing something about leaving the entire fraction in a square root bracket thing is improper. I really don't know though, and I don't feel like researching much.
Moved from article - not sure what it means
the quadratic equation also would mean that {x^2+(bx/a)=(-c/a)} reversed equals {((-c-bx)/a)=x^2}
square rooting equals {sqrt/ ((-c-bx)/a)/}=x
if {sqrt/(-c-b)/a/}x = x, than {/sqrt-c-b=a/}
if sqrt(-c-b)=a is inversed, than {sqrt/(-c-b)/}-a/}=0--67.49.12.102 06:25, 9 Nov 2004 (UTC)benjamin j. giglione
But what would you use it for in the real world?
<math>Insert formula here<math> I learnt about quadratic equations at school over 35 years ago but I still don't know what I would use them for in the real world. Ignorance is not bliss!
I'd say it'd be useful if you go into a math-related career path, like NASA or something.
