Using exponents don't understand what's 9 cubed and 20 squared how do I do it in expanded form whett

Expanded form is when you just write it out.

so 9 cubed becomes:

9*9*9

and 20 squared becomes:

20*20

the exponent tells you how many times to multiply that number by itself. so, whenever it asks for expanded form, you just write the number how ever many times the exponent tells you to and multiply them all.