Answer:
or 
Step-by-step explanation:
The given equation is

Let us treat this as a quadratic equation in
.
where 
The solution is given by the quadratic formula;

We substitute these values into the formula to obtain;





or 
or 
or 
or 
Answer:
c
Step-by-step explanation:
if its talking about what ones a factor or moltiple of 20 then c if not then i dont know
The answer should be -4,
7x2=14
2x-9=-18
14+ -18= -4