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That looks simple enough for me; but if you want to factor it, you can use the formula for the difference of two squares.

Q: Simplify a4 - 81

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Use exponents to simplify. Since there are four a's, you can write this as: a4.

2/81

Multiply and simplify 3^-2 x3^6

81 27,3 9,3,3 3,3,3,3

81

Yes.

a4 x a8 = a22 x a23 = a25

The square root of 81 is ±9 which is in its simplest form.

a2/a6 = 1/a4

81/200 is in its simplest terms

Yes 4/9

In order to answer this: 81x = 36 ;; x = 36/81. You can simplify this by a factor of 9 and you get 4/9.