Question

Hi I’m I don’t understand a variable of what this is saying.

Answer 1

given expression to simplify,

`q^(-3)r^0s^(-1)\cdot\: q^3r^(-9)s^0`
`\begin{gathered} q^(-3)r^0s^(-1)\cdot\: q^3r^(-9)s^0 \\ q^(-3)\cdot q^3=1 \\ \: =r^0s^(-1)r^(-9)s^0 \\ =1\cdot(1)/(r^9)s^(-1)s^0 \\ =1\cdot(1)/(r^9)\cdot(1)/(s) \\ =(1)/(r^9)\cdot(1)/(s) \\ =(1)/(r^9s) \\ =r^(-9)s^(-1) \end{gathered}`