28 hope this helps if it does thank me later
Answer: There is one solution, -20
Step-by-step explanation:

There is one solution, -20
Hope it helps <3
Write these steps down
Positive times positive=positive
Negative times positive=negative
negative times negative= positive
when any two numbers that are negative it will always equal a positive.
Its a rule for math.
A2 + b2 = c2
Number 1 is 15.1986.... or 15.2
Explanation: 5 squared is 25 and 16 squared is 256. Subtract 256 minus 25 to get 231, then divide it by the square root.
Number 2 is 7.21111.... or 7.2
Explanation: 6 squared plus 4 squared is 52, square root of 52= 7.2