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日本数学竞赛，若(a^2-4a+6)(9b^2+6b+6)=10, a+b=?初中生小意思
日本数学竞赛，若(a^2-4a+6)(9b^2+6b+6)=10, a+b=?初中生小意思
初中数学中考竞赛经典例题——代数部分71/465
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