Which expression is equivalent to 10x^5y^12/-5x^-2y-6 ? assume x=0, y=0

For this case we have the following expression:
 
 Rewriting the expression we have:
 
 Then, by properties of exponents we have:
 "In a division, if we have the same base, the exponents are subtracted"
 We have then:
 
 
 An expression that is equivalent is:
 

Use the factor pairs of 36.  You'll find that he has
9 different ways to arrange them:

1 x 36 ... 1 tulip each in 36 vases, or 36 tulips in1  vase

2 x18 ... 2 tulips each in 18 vases, or 18 tulips each in 2 vases

3 x 12 ... 3 tulips each in 12 vases, or 12 tulips each in 3 vases

4 x 9 ... 4 tulips each in 9 vases, or 9 tulips each in 4 vases

6 x 6 ... 6 tulips each in 6 vases