If X = -2, then X3 - X2 - X - 1 is equal to
- A1
- B-3
- C-11Correct
- D-15
Explanation
To solve this, substitute the value of X with minus 2 in the given expression: X cubed minus X squared minus X minus 1.
Step 1: Minus 2 cubed is minus 8. Step 2: Minus 2 squared is 4, so minus X squared becomes minus 4. Step 3: Minus X becomes minus of minus 2, which is plus 2. Step 4: The constant is minus 1.
Combining these values: minus 8 minus 4 plus 2 minus 1. Minus 12 plus 2 minus 1 equals minus 10 minus 1, which equals minus 11.
Therefore, the correct option is C.
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