Question

What is the product of 4x – 3 and x + 8?

Answer 1

Just need to foil them. Or distribute.

Answer 2

Are you familiar with the process?

Answer 3

\[4x ^{2}+32x-3x-24\]

Answer 4

yes i was jus confused on tht .. thanks polpak

Answer 5

anwer\[4x ^{2}-29x+24\] becomes

Answer 6

confused about what?

Answer 7

if i needed to do foil

Answer 8

ah.. Yep.

Answer 9

@ mathfrick .. it would actually be -24 right?

Answer 10

yes

Answer 11

foil tends to be extra baggage to remember; i think.

just multiply them together:

4x –3
x +8
-------------
32x -24
4x^2 -3x
-------------
4x^2+29x -24

Answer 12

yeah -24 sorry 4 that mis understanding

Answer 13

I agree. Foil is memory clutter. I personally prefer to use the same strategy I use on monomials:

\[(4x-3)(x+8) = 4x(x+8) - 3(x+8) = 4x^2 + 32x - 3x - 24 =\ ...\]

Answer 14

Plus this method works with any number of terms.

Answer 15

thank u so much guys!