[Python] How to fix 'ValueError: math domain error' for square root?

I am trying to write a program that calculates formula y = √(x*x + 3*x - 500), Interval is [x1;x2] and f.e x1=15, x2=25.

I tried to use Exception Handling but it didn't help. And the code I try to use now gives me: ValueError: math domain error

import math

x1 = int(input("Enter first number:"))
x2 = int(input("Enter second number:"))
print(" x", " y")
for x in range(x1, x2):
formula = math.sqrt(x*x + 3*x - 500)
if formula < 0:
print("square root cant be negative")
print(x, round(formula, 2))


The output should look like this:

x y
15 ***
16 ***
17 ***
18 ***
19 ***
20 ***
21 2.00
22 7.07
23 9.90
24 12.17
25 14.14

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