Examine the steps shown for testing whether or not x = 1 is a zero for the function f(x) = x^3 -3x +2. Identify the first line in which an error occurred.

Question

{ There's like, an L with a long bottom line that holds the numbers, lines one and two are above the bottom line of it. Line one has a one on the outside of the top line, then the rest of the numbers are on the other side: 1, 0, -3, 2.
Line 2 has nothing on the outside, but on the inside there is an arrow pointing down which i'm assuming is taking the 1 from line 1 and putting it on the answer line. The numbers on line 2 are 1, 2, and -1. line 3, under the lower line of the "L", has these numbers: 1, 1, -1, and then there's a little L that is holding a 1. I think I did a bad job explaining but anyone who knows how to answer this question will hopefully know what I'm talking about. }
A. line 1
B. line 2
C. line 3
D. there are no errors
I think it might be D? but I have no clue

Answer 1

To find the zero, you need to narrow the interval where the sign changes. It's hard to figure just what was going on here, but they probably picked an interval where the sign did not change, and that would not have helped find where f(x) = 0

Answer 2

The error is in line 2. If I understand what you are saying I believe it is line 2 because
1x1=1
Not 1x1=2
Hope this helped :)