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2a2 - ab - 3b2 + 9 when a = 3 and b = 2​
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2a2 - ab - 3b2 + 9 when a = 3 and b = 2​

User Weiweishuo
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2(3^2)−(3)(2)−3(2^2)+9

2(3^2)−(3)(2)−3(2^2)+9

= 9

User Nidya
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