Question

Are z^3 and 3z eqivalent expressions? explain

Answer 1

Given the expressions:

`\begin{gathered} z^3 \\ 3z \end{gathered}`

these two expressions are not equivalent, since one is thrice a number and the other is a cubic number. We can see this if we write completely each expression:

`\begin{gathered} z^3=z\cdot z\cdot z \\ 3z=z+z+z \end{gathered}`

thus, the expressions are not equivalent