There is one and only one real solution, and no imaginary solutions, of the equation x13 = 1. The solution is x = 1. If x = -1 then x13 = -1, so that does not work. If x = i, then x13 = -i, so that does not work. If x = -i, then x13 = -i, so that does not work.
12 multiplied by 13 is 156.
1 x13 =13
The product of 18 and 13 is 234
3x5x5x5x13 3x53 x13
19'x13'
130 square feet !
143 square feet.
299 square feet = 33.22 square yards
(13 x 13) sq ft...
18 feet x13 feet is ~21.7 square meters.
14 ( x13, x5, x7)