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discriminant , racines , sommet

from math import*

def discriminant(a,b,c):
    return b*b-4*a*c



def racines(a,b,c):
    delta=discriminant(a,b,c)
    if delta == 0 :
        return -b/(2*a)
    elif delta > 0 :
        x_1=(-b-sqrt(delta))/(2*a)
        x_2=(-b+sqrt(delta))/(2*a)
        return x_1,x_2
    else :
        return 'pas de racines reelles'
        #        return None
    

def formecanonique(a,b,c):
    alpha= -b/(2*a)
    beta= a*(alpha)**2+b*alpha+c
    return alpha,beta