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SASMO 2022 Grade 10 Question 2

SASMO · SASMO 2022 Grade 10

Question 2

Given $-1\le a-3\le2$ and $-2\le b+5\le2$, find the least possible value of $$a^2-ab+b^2-ab.$$
  1. 0
  2. 4
  3. 25
  4. 144
  5. None of the above