27
25
18
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99 . . .
The two numbers that multiply to 80 and add to -18 are -10 and -8. This is because (-10) × (-8) = 80 and (-10) + (-8) = -18.
The numbers that add to get 6 and multiply to get 81 are 3 and 3.
-27
Yes
-3 and -6
9, 18 and 36
The numbers are: 9 + square root of 129 and 9 - square root of 129
29
-154
-25
the answer is 18
25
-25
18