Question

Find the two products below. Compare and contrast, in complete sentences, the similarities and differences of the two.

(x + 4)(x − 4) and (x + 4)(x + 4)

@eSpeX

Answer 1

Did you try to use FOIL to multiply these ?

Answer 2

Multiply the first parenthesis by the second, right?

Answer 3

FOIL: first, outer, inner , last

there are 4 multiplies to do
(x+4)(x-4)

can you try ?

Answer 4

Yeah, I'll do it. Give me a sec. :)

Answer 5

see the picture in
http://en.wikipedia.org/wiki/FOIL_method
if you don't remember how

Answer 6

Like this? http://www.sketchtoy.com/35412511 Correct @phi ?

Answer 7

@Mertsj

Answer 8

you should get 4 terms (that you can simplify)

the x^2 is correct (that is the First)
what do you get for Inner ?

Answer 9

I'm confused as to how I got it wrong. :o

Answer 10

http://www.sketchtoy.com/35413033

Answer 11

Oh jeez, major brain spazz. > .< Thanks for pointing that out.

Answer 12

http://www.sketchtoy.com/35413764 Like this? Right?

Answer 13

@radar

Answer 14

@phi

Answer 15

@jim_thompson5910

Answer 16

can you show all 4 multiplies?

Answer 17

http://www.sketchtoy.com/35415075