The answer is the first one. Explanation: X^3 stays the same because there are no other cubed numbers in the problem Next you combine the x^2s The x^2s are +3x^2 and +2x^2 Since they are both positive, you add them: 3x^2 + 2x^2 = 5x^2 Next you do the x values -x and +6x, also known as 6x - x = 5x Lastly, you just add in the -2 and get: X^3 + 5x^2 + 5x - 2
