First bring the 9 to the other side by subtracting it so you get the equation; x^2+10x-9=0 and you answer would be x=9 and x=1. you may have wrote the question own wrong? is the x^2 negative? if so i give my answer :)
If the line is flipped you know what to do flip it over
Combine like terms you add -10x and 3x which is -7x-4
$6 ? 5+4 =9
9-3 =6
I don't know if this is correct but this is how I would do it
