问题 解答题 a×12=b×b=a×b=x×y×7=5×x=2×c×c=7x×5=2×a×b= 答案 a×12=12ab×b=b2a×b=abx×y×7=7xy5×x=5x2×c×c=2c27x×5=35x2×a×b=2ab
