Question

Multiply.
(d-8)(d+8)
Simplify your answer.​

Answer 1

FOIL

FIRST

OUTSIDE

INSIDE

LAST

First:

(d-8)(d+8)

d * d

`d^(2)`

Outside:

(d-8)(d+8)

d * 8

8d

Inside:

(d-8)(d+8)

-8 * d

-8d

Last:

(d-8)(d+8)

-8 * 8

-64

so...

d^2 + 8d + (-8d) + (-64)

d^2 - 64

Hope this helped!

Answer 2

d^2 - 64

Explanation:

This is the difference of squares. The middle 2 terms cancel out.

d^2 - 8d + 8d - 8*8

d^2 - 64