Easy -1.2 This is a straightforward surd expansion requiring only the formula (x-y)² = x² - 2xy + y², followed by simplification. It's a standard textbook exercise with no problem-solving element—students simply apply a memorized algebraic identity and combine like terms. Easier than average for A-level.
3 Write $( \sqrt { 3 } - \sqrt { 2 } ) ^ { 2 }$ in the form $a + b \sqrt { 6 }$ where $a$ and $b$ are integers to be determined.
\hfill \mbox{\textit{OCR MEI C1 Q3 [4]}}