9x3 is also 9+9+9. 9x3 = 27
To find the sum of something means to add. Example: 9X3=27 The sum of 9x3 is 27.
because their the same number just switched in place
If that's -9x^3 - 3x^2 + 3x + 1, that factors to (1 - 3x^2)(1 + 3x)
The GCF is 9x^2.
= 53 9x3 + 9x2 + 5x1+ 3x1 27 + 18 + 5 + 3
The Greatest Common Factor is 3.