3x7x7x7x7 in index notation 2x9x9x9x2x9plz thx

The index notation involves writing numbers in index form.

The index forms are: and  

Rewrite as:

Apply law of indices

Hence, the index form is:

Rewrite as:

Rewrite as:

Apply law of indices

Hence, the index form is:

Read more about the index form of expressions at:

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i think the length is 12 and the width is 17

there are infinitely many solutions.