Answer:
3x² - 1
Step-by-step explanation:
(x -1)(x+1) + 2x²
x² - 1 + 2x²
3x^2 -1
First use foil on the binomials, and then you have x^2 +x -x -1 +2x^2. Once you simplify that it will give you 3x^2 -1
