Subtract $-3a^{2} + 5ab - 2b^{2}$ from $a^{2} - ab + b^{2}$.
- $4a^{2} - 6ab + 3b^{2}$
- $4a^{2} + 4ab + 3b^{2}$
- $-2a^{2} - 6ab + 3b^{2}$
- $4a^{2} - 6ab - b^{2}$
Solution
Asked in: IMO
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