python - returns incorrect positive #
- by tekknolagi
what i'm trying to do is write a quadratic equation solver but when the solution should be -1, as in quadratic(2, 4, 2) it returns 1
what am i doing wrong?
#!/usr/bin/python
import math
def quadratic(a, b, c):
#a = raw_input("What\'s your `a` value?\t")
#b = raw_input("What\'s your `b` value?\t")
#c = raw_input("What\'s your `c` value?\t")
a, b, c = float(a), float(b), float(c)
disc = (b*b)-(4*a*c)
print "Discriminant is:\n" + str(disc)
if disc = 0:
root = math.sqrt(disc)
top1 = b + root
top2 = b - root
sol1 = top1/(2*a)
sol2 = top2/(2*a)
if sol1 != sol2:
print "Solution 1:\n" + str(sol1) + "\nSolution 2:\n" + str(sol2)
if sol1 == sol2:
print "One solution:\n" + str(sol1)
else:
print "No solution!"
EDIT: it returns the following...
import mathmodules
mathmodules.quadratic(2, 4, 2)
Discriminant is:
0.0
One solution:
1.0
