def delta(a,b,c):
    sonuc = b**2-(4*a*c)
    return sonuc

sayi1 =  input("gir1:")

sayi2 =  input("gir2:")

sayi3 =  input("gir3:")

print(delta(sayi1,sayi2,sayi3))

def deltaal(a,b,c):
    delta = b**2-4*a*c
    return delta

print(deltaal(5,10,2))   

Traceback (most recent call last):
  File "C:/Users/emre-/Desktop/delta.py", line 8, in <module>
    print(delta(sayi1,sayi2,sayi3))
  File "C:/Users/emre-/Desktop/delta.py", line 2, in delta
    hesapla= b**2-4*a*c
TypeError: unsupported operand type(s) for ** or pow(): 'str' and 'int'

def ortalama(a,b):
    ort = int(a+b)/2
    return ort

h = input("Ortalamasi Alinacak 1. Sayi:")
g = input ("Ortalamasi Alinacak 2. Sayi:")     

print("Ortalamaları:",ortalama(h,g))