Thread: Paladin
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Old 01-21-2003, 06:25 AM   #8
Seraph
Quintesson
 

Join Date: September 12, 2001
Location: Ewing, NJ
Age: 43
Posts: 1,079
Quote:
And since your here, I need some help on math, what's 5x^2-99x+ 16?
Quote:
I'm assuming that entire equation is equal to zero.
If so the answer is x=.16295732781
There are actually two values for x that will work.

The way to answer the question is as follows.

If we say the formula has the form:
a*x^2 + b*x + c

Then
a = 5
b = -99
c = 16

Using these values for a, b, & c, and the following formula. (+- means plus or minus, you should get two vales for x, one where you put a plus there, the other where you put a minus there.)
x = [-b +- SQRT(b*b - 4 * a * c)] / (2 * a)

We can get two values for x.
x = 99/10 +- SQRT(9801 - 320)/10
x = 9.9 +- SQRT(9481)/10
x = 9.9 +- 97.37042/10
x = 9.9 +- 9.737042
x = 0.162957... [OR] 19.647042...

[ 01-21-2003, 06:27 AM: Message edited by: Seraph ]
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