5x5x5=125 so it could be x=5
I believe the first and last one are polynomials. Usually they start with the highest exponent first and then work their way down.
So remember that the distance formula is
.
1.

Distance between (4,-5) and (4,-2) is 3 units.
2.

Distance between (1,1) and (-1,4) is √13 (or 3.61 rounded to the hundreths) units.
I got 9.75 hope it's right
The factors are 6 and x + 5