Answer:
-4^81 = -5846006549323611672814739330865132078623730171904
Explanation:
You want to simplify ((-4)^9)^9.
Rules of exponents
The applicable rule of exponents is ...
(a^b)^c = a^(bc)
Here, this means ...
((-4)^9)^9) = (-4)^(9·9) = (-4)^81
The exponent is odd, so there are an odd number of minus signs in this product. That means the result is negative. We can simplify this further to ...
= -4^81
= -5846006549323611672814739330865132078623730171904
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Additional comment
Most calculators will give you this 49-digit number in scientific notation, showing 10-16 digits, depending on the calculator.
<95141404393>