operations

[mwise]

I need help with this problem. finals are tomorrow! [(3p-q)-1][3p-q)+1]=?
I can't remember if I have to foil or use a factoring formula?

 

[Deleted member 4993]

I need help with this problem. finals are tomorrow! [(3p-q)-1][3p-q)+1]=?
I can't remember if I have to foil or use a factoring formula?

The formula that you want to use is:

\(\displaystyle (a+b)\cdot (a-b) \ \ = \ \ a^2 - b^2\)

Ofcourse you derive this formula through foil.

 

[gkagawa]

I need help with this problem. finals are tomorrow! [(3p-q)-1][3p-q)+1]=?
I can't remember if I have to foil or use a factoring formula?


Answer : Using foil , you will get a final answer of (3p-q)[sup:21j8i2x9]2[/sup:21j8i2x9]-1