Easy -1.2 This is a straightforward algebraic expansion and simplification requiring only basic distributive property and combining like terms. It's routine C1 content with no problem-solving element—purely mechanical manipulation that's easier than average A-level questions.
Attempt to expand both pairs of brackets. No more than one "missing term"
Expansion with at most one incorrect term (no missing terms)
A1
Do not allow "invisible brackets" unless final answer correct. Allow one simplified incorrect term e.g. \((x^2 + 5x - 4)\)
\(= x^3 - 6x^2 - 11\)
A1 [3]
cao
Question 1:
[answer/working] | [mark] | [guidance]
```
# Mark Scheme Extraction
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## Question 1:
| Answer | Marks | Guidance |
|--------|-------|----------|
| $x^3 - 5x^2 + 3x - 15 - (x^2 + 4x - x - 4)$ | M1 | Attempt to expand both pairs of brackets. No more than one "missing term" |
| Expansion with at most one incorrect term (no missing terms) | A1 | Do not allow "invisible brackets" unless final answer correct. Allow one simplified incorrect term e.g. $(x^2 + 5x - 4)$ |
| $= x^3 - 6x^2 - 11$ | A1 [3] | cao |
---