What is the product of (9) (negative 9) (negative 1)? –81 –1 1 81

81 (Option D)

Step-by-step explanation:

If you know, you know.

K now that ur done lets go watch harry potter for the 100th time

Step-by-step explanation:

9 * -9 * -1 =

-81 * -1 =

81 <===

In multiplying (or dividing), if the signs are the same, the result is positive

if the signs are different, the result is negative

these rules do not apply to addition or subtraction

Yes it is.

Step-by-step explanation: