How do you factor the trinomial #y^2-7y-30#?
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.
To factor this, you have to find 2 numbers such that
Using the FOIL method, we can expand this to check