�ã2(9�ã3 - 9�ã9)
To simplify this expression, we can apply the rules of exponents and perform the necessary calculations.
Step 1: Start by simplifying the interior of the parentheses.
Inside the parentheses, we have 9^3 - 9^9.
Step 2: Evaluate each exponent.
9^3 means 9 raised to the power of 3, which is 9 * 9 * 9 = 729.
Similarly, 9^9 means 9 raised to the power of 9, which is 9 * 9 * 9 * 9 * 9 * 9 * 9 * 9 * 9 = 387,420,489.
Step 3: Substitute the values back into the expression.
Now, we have 2(729 - 387,420,489).
Step 4: Perform the subtraction within the parentheses.
Subtracting 387,420,489 from 729 gives -387,419,760.
Step 5: Multiply by 2.
Finally, we multiply the result by 2: 2 * -387,419,760 = -774,839,520.
Therefore, the simplified expression is -774,839,520.