Step by step explanation: 
9
 +6x+5=0
+6x+5=0
Uses the "a", "b", and "c" from "a
 + bx + c", where "a", "b", and "c" are numbers
 + bx + c", where "a", "b", and "c" are numbers
So in this case: 
a would be 9
b would be 6
c would be 5
Then plug in from there..
Another way you can do it is using the square method.