Question

Which expression is equivalent to 15 x^3 z^5/ 3 x^7 z^-5

A 12/x^10
B 5x^4
C 5(x/z)^10
D 5(z/x)^10
E 12(z/x)^10

Answer 1

15 x^3 z^5/ 3x^7 z^-5

15/3×x^(3-7)×z^(5+5)

5×x^-4×z^10

5z^10/x^4