Answer:
81
Step-by-step explanation:
Here, some steps to evaluate (-9)².
Step 1 :- A negative base raised to an even powers equal positive.
Step 2 :- Write exponentiation as multiplicaton.
Step 3 :- Multiply it .
Another way to evaluate ( -9 ) ².
Evaluate by multiply with it's exponent.
When two negative sign combine they formed positive
So, after multiplying we get 81.