Question : Find the solution set of the equation
It is given that x= -9 is one of the roots
If you want to get really, really "technical" (and mathematicians are notorious for that!), since the problem asked for "solution set", the answer is the set of those solutions: {-9, 7, 2}. (Warning: I am assuming those are the correct solutions; I didn't check them.)
Thanks HallsofIvy and Prove It for helping me
Cheers