题解 | #计算一元二次方程#
计算一元二次方程
http://www.nowcoder.com/practice/7da524bb452441b2af7e64545c38dc26
while 1:
try:
a , b ,c = map(float, input().split())
if a == 0:
print("Not quadratic equation")
else:
dela = (b **2) -(4 * a * c)
if dela == 0:
dela = (-b)/(2*a)+0
print("x1=x2={:.2f}".format(dela))
elif dela > 0 :
dela1 = ((-b) +(dela ** 0.5) )/(2*a)
dela2 = ((-b) - (dela ** 0.5) )/(2*a)
print(f"x1={dela2:.2f};x2={dela1:.2f}")
else:
if b == 0:
a1 = 0
b1 = (dela**0.5)/(2*a)
else:
a1 = (-b)/(2*a)
b1 = ((-dela)**0.5)/(2*a)
if b1 < 0:
b1 = abs(b1)
print(f"x1={a1:.2f}-{b1:.2f}i;x2={a1:.2f}+{b1:.2f}i")
else:
print(f"x1={a1:.2f}-{b1:.2f}i;x2={a1:.2f}+{b1:.2f}i")
except:
break
