36, because the square root of 4 is 2 and the square root of 81 is 9. You multiply those and then double it to get 36.
It's 15 m8 m8 m8 15 so yah.
You add the two numbers and divide them by two
There are no values of X that equation true .
This is equals 3 and 18/56 which reduces to 3 and 9/28 all you have to do is plug it the calculator like it is shown and then you will get this answer