formula incorrect

[StevenJUlbrich]

def get_distance_between_points(first, second):
(x1, y1) = first
(x2, y2) = second

x_diff = x2 - x1
y_diff = y2 - y1

return math.sqrt(x_diff * x_diff + y_diff * y_diff)  #wrong

return math.sqrt((x_diff**2) + (y_diff**2))  #proper

[SivaRamana-H-V]

Without using math

x = x2 - x1
y = y2 - y1

return math.sqrt(x * x + y* y)  #wrong

return ( ( ( x**2 )**0.5 ) + ( y**2 )**0.5 )