multiply is what it says but?

Question

I hate these because im not sure if i use FOIL or what can some one help me out big timeee im alll lost whats the answer because i need to show work i can show work once i kno the answer thanks for the help the person who helps me the most gets 10 points

(3c-3d)(4c-4d)

thank you veyr much i used foil and it worked!

Answer 1

(3c-3d)(4c-4d)
=3c*4c -3c*4d-3d*4c+3d*4d
=12c^2 - 12cd - 12cd +12d^2
=12c^2 - 24cd + 12d^2 (you can stop here or continue like following)
=12 *(c^2-2cd+d^2)
=12 *(c-d)^2

Just remember:

1) (A+B)(C+D) = AC + AD + BC +BD

2) A^2 - 2AB + B^2 = (A-B)^2

Good luck!

Answer 2

Yes, use FOIL
(3c-3d)(4c-4d)
3c*4c + 3c*(-4d) -3d*4c-3d*(-4d)
12c^2 - 12cd -12cd + 12 d^2
12c^2 -24cd+ 12d^2

Answer 3

you find the common variables and multiply them.

c(3+4)+d(-3-4)
3c+4c+-3d-4d
7c-7d

i hoped that helped i don't use foil cuz that confuses me but this way works for me.

Answer 4

FOIL:

(A-B)(C-D)= AC-AD + -BC+BD

Based on you example.

(3c-3d)(4c-4d)= 12c^2-12cd-12cd+ 12d^2= 12c^2-24cd+12d^2

Answer 5

use foil. trust me

Answer 6

(3c-3d)(4c-4d)
(3c*4c)(3c*-4d)(-3d*4c)(-3d*-4d)
12c(square)-12cd-12cd+12d(square)
12c(square)-24cd+12d(square)