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def aantal_wortels(a, b, c):
determinant = (b ** 2) - (4 * a * c)
wortels = "2 wortels"
if determinant < 0:
wortels = "geen wortels"
elif determinant == 0:
wortels = "1 wortel"
return wortels
# test de functie
print(aantal_wortels(2, 4, -6))