Hi everybody,

I can't seem to work out how to factorize this particualar sum. Could someone please explain how you go through it?

The sum is:

$\displaystyle 10(2x+y)^2+11(2x+y)-6$

My book gives this as the answer, although I don't know how to get there:

$\displaystyle (10x+5y-2)(4x+2y+3)$

Any help would be much appreciated,

Thanks!

Drew