Question

Find the product. (-d + 4)(-d - 4)

Answer 1

$d^{2}+4d-4d-16= d^{2}-16$

Answer 2

Answer:

$d^2 -16$

Step-by-step explanation:

(-d + 4)(-d - 4)

Apply FOIL method to multiply it

First multiply -d inside the second parenthesis -d-4

$-d * -d = d^2$

$-d *(-4)= 4d$

$4 * (-d) = -4d$

$4 * (-4)= -16$

Now combine all the terms

$d^2 +4d -4d -16$

$d^2 -16$