Choose the correct product of (6x − 2)(6x + 2).

Question

parthkohli · Answer

Continue, lou
we all waiting for you

parthkohli · Answer

May I type it then?

anonymous · Answer

Yeah sure. :)

parthkohli · Answer

No I guess you should

parthkohli · Answer

Okay, seems like Lou left.
There are two different ways to do this question:
* Actually multiply
* Use the identity $(a + b)( a- b) = a^2 - b^2$

parthkohli · Answer

Which one would you like?

parthkohli · Answer

I'd like the first one for the understanding.

$ \color{Black}{\Rightarrow (6x + 2)(6x - 2)}$

$ \color{Black}{\Rightarrow 6x(6x - 2) + 2(6x - 2) }$

$ \color{Black}{\Rightarrow 36x^2 - 12x + 12x - 4 }$

$ \color{Black}{\Rightarrow 36x^2 - 4 }$

anonymous · Answer

lolz I was waiting for lou too! :)

anonymous · Answer

Sry zakia, had internet issues. He's really good though too in explaining :)

anonymous · Answer

lol i see =]