Question

Factor completely. 3r^2-3 If a polynomial is prime, state this

Answer 1

1. take out the common factor
3r^2-3
= 3 (r^2 -1)

2. use the identity a^2 - b^2 = (a+b)(a-b) to factorise r^2 -1
= 3(r-1)(r+1)

Answer 2

Is that the final answer for factoring the equation?

Answer 3

What do you think ?

Answer 4

It looks factored to me. Thanks.

Answer 5

Welcome :)