求方程的根:#3x2 + 4x -5 = 0from math import sqrta=3; b=4; c= -5dis=bb - 4a*c
r1 = (-b + sqrt(dis) ) /(2a)r2 = (-b - sqrt(dis) ) /(2a)print('r1= ', r1)print('r2= ', r2)
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import math a=3 b=4 c=-5 dis=b*b - 4*a*c p=math.sqrt(dis) r1 = (0-b+p)/(2 * a) r2 = (0-b-p)/(2*a) print('r1= ', r1) print('r2= ', r2)
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