3Q very much

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3Q very much

3Q very much
3Q very much

3Q very much
第一题:分子分母同时乘以30化简为(45x平方-20y平方)/(9x平方-4y平方),然后分子提取公因数5,其余部分分子分母相约,答案为5
第二题:分子分母同时乘以6,化简得(3a-6b)/(6a-2b)

同时乘以最小公倍数?