import math def quadratic(a, b, c): d = b b - 4 a c e = math.sqrt(d) x1 = (-b + e) / 2 a x2 = (-b - e) / 2 * a if a == 0: print('此方程无解！') else: return (x1, x2) print(quadratic(2, 3, 1)) print(quadratic(1, 3, -4))
答案为(-2.0, -4.0) (1.0, -4.0)
2a带上小括号 (-b+e)/(2a)
2*a带上小括号。 (-b+e)/(2*a)
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单身旺2016
import math def quadratic(a, b, c): d = b b - 4 a c e = math.sqrt(d) x1 = (-b + e) / 2 a x2 = (-b - e) / 2 * a if a == 0: print('此方程无解！') else: return (x1, x2) print(quadratic(2, 3, 1)) print(quadratic(1, 3, -4))
答案为(-2.0, -4.0) (1.0, -4.0)