Answer:
(x+9) (x-2)
Explanation:
The factors to this equation is (x+9) and (x-2).
You can get this by (1) grouping the the numbers, in this case the 9x and 2x will subtract and end up as 7x.
Your equation will now like this: x^2+7x-18
We can look at our equation using this formula now, ax^2+bx+c.
"a" is this case is 1, "b" is seen as 7, and "c" is -18.
From here we can find the factors that multiply to our "c" which is -18, but also add up to our "b" which is 7.
We can use our multiplication knowledge, and get the two factors of 9 and -2, and with these two numbers we then end up with the factors of (x+9) and (x-2).