Question

Multiply the following expressions:

Answer 1

\[a(a+1)(a-1)\frac{ 2 }{ a^2-1 }\]

Answer 2

@Jack1 , HI ! :)

Answer 3

heya cookii ;)

Answer 4

i know, a^2-1 is (a+1)(a-1), but how do I set it up?

Answer 5

You can think of this as one fraction times another...

That is, we can multiply the 2 to the top, and the a^2-1 times the 1 in the bottom.
Now, when attempting to simplify, it is helpful to see if you can factor to cancel out terms.
Can you factor a^2-1?