Use an area model or the distributive property.

(4x + 5) (4x-5)

16x-35

Step-by-step explanation:

Firstly, take the 4x in the first parenthesis and multiply it by the 4x and the - 5 in the second parenthesis.

Second, multiply the + 5 by the 4x and the - 5 in the second parenthesis.

Finally, take both answers and add them together.