37
There are four solutions to 9x4 plus 27x3 - 4x2 - 12x equals 0. One of the solutions is x = -3.
9x4 doubled = 9x8
9x4 is 36 and 8x3 is 24
32 because 9x4=36 36-4=32
37
-18
9x4
36
Yes, 9x4=36
Yes: 9x4=36
Your question looks like: x7 - 9x4 + 3x2 + 3. This problem cannot be solved using synthetic division alone--you need to know what to divide by. There are some ways to find possible solutions to try dividing by (Rational Roots Test & Descartes' Rule of Signs), but I've done that for this problem, and none of the solutions are rational. I feel like you left out part of the question.