Answer:
We need a picture to help you. I'm sorry :(
13-x = 13- x
theres is no answer for that x its a variable and 13 is a constant so is just 13-x
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
A is 4 and b is 63 have a good day
