(5w - 1) (w + 4)
First distribute 5w into the second expression.
(5w X w) + (5w X 4)
5w² + 20w
Next, we'll work on the second half of the first expression to find out the rest...
(-1 X w) + (-1 X 4)
-w - 4
If we combine like terms of the first and second expression, we have our answer.
5w² + 19w - 4
