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Homework Help Needed for Quadratic Formula

 
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Homework Help Needed for Quadratic Formula
paingpyi
14 Dec, 2006 - 12:21 PM
Post #1

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Write a complete C program to
determine the roots of the
quadratic equation
ax2+bx+c = 0
Using the well-known quadratic formula.
Following is the image of the formula to be used and hints.
IPB Image

I've written this code but it's not complete. I don't understand that math concept.
Anyone please help me! Thanks

CODE
#include "stdio.h"
#include "math.h"

int main()
{
float a=3;
float b=6;
float c=3;

float x;

x = ((-b) + sqrt(b*b)-(4*a*c))/(2*a);

printf("x is %f",x);


return 0;
}





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gordo
RE: Homework Help Needed For Quadratic Formula
14 Dec, 2006 - 09:39 PM
Post #2

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Your sqrt() coding is incorrect.

sqrt( b*b -4*a*c) is ok.
You were pretty close though. I think U should get it now.

Don't forget, you need 2 answers, not 1. (hint)
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Jayman
RE: Homework Help Needed For Quadratic Formula
14 Dec, 2006 - 09:54 PM
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This code snippet submitted by another member may help you with your problem. It is written in C++, but you should get the idea.
http://www.dreamincode.net/code/snippet391.htm
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