y^2 + 13a + 30
It should come out to (y+_)(y+_)
I think you mean:
y2 + 13y + 30
What two numbers add up to 13 and multiply to 30?
+ 10 and + 3 add up to 13 and multiply to 30
So...we can factor it like this:
(y + 10)(y + 3)