# How do you factor the trinomial #y^2-7y-30#?

##### 3 Answers

#### Explanation:

#### Explanation:

For a simpler trinomial like this quadratic, in the form

If you can't immediately see that then you can use another method like completing the square:

So if our roots are 10 and -3, the factorisation of it is

I hope I've explained that well enough.

#### Explanation:

To factor this, you have to find 2 numbers such that

Since

Using the FOIL method, we can expand this to check