(3x -1) + (9x^2 -1)

Question

its been 1 year since my teacher taught me this.. so I can't remember now xD

pls reply :)

 

I think there is no answer because you can't add with different exponents

 

Answer 1

You did not specify what do you need to do. Here may be two types of problems: simplify or factor.

Answer #1 shows you the solution for the first type.

In case of factoring you can factor simplified quadratic trinomial, or you can factor the second set of parentheses as difference of squares a² - b² = (a - b)(a+b):

(3x-1) + (3x - 1)(3x + 1) 

Then you can factor out (3x - 1) 

(3x - 1)(1 + 3x + 1)

(3x -1)(3x + 2)

Answer 2

(3x -1) + (9x^2 -1)

3x - 1 + 9x^2 - 1

9x^2 + 3x - 2