(2a-3)^2-(2a-3)(a-1)+(a-1)^2
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Answer:
After solving the equation,
==4a^2-12a+9-(2a^2-5a+3)+a^2-2a+1
==4a^2-2a^2+a^2-12a+5a-2a+9-3+1
==3a^2-9a+7
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