Foil Method

How do you  multiply these with the foil method?
(-3t - 5v)(-4t - 4v)

Each letter of the word FOIL, tells you what terms to multiply: 

First terms (-3t)(-4t) = 12t2
Outer terms (-3t)(4v) = 12tv
Inner terms (-5v)(-4t) = 20tv
Last terms (-5v)(-4v) = 20v2

= 12t2+ 12tv + 20tv + 20v2{used foil method}
= 12t2+ 32tv + 20v2{combined like terms}

- Algebra House