what is the greatest positive integer x such that 3 ^ x is a factor of 9 ^ 5 ?
"what is the greatest positive integer x such that 3 ^ x is a factor of 9 ^ 5 ? 9 ^ 5 = ( 3 ^ 2 ) ^ 5 = 3 ^ 10 c . 10"
multiply(subtract(9, 5), 5)