# How do you factor #y= x^2 – 3x – 40# ?

##### 1 Answer

Mar 23, 2018

It factors to (x+5)(x-8)

#### Explanation:

Because we see that the highest order of

using those relationships:

Because the product of

I guessed that the numbers must be 5 and -8 because:

Now that we have our factors, we can finish our factoring: