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主要内容

因式和整除性

问题

老师在黑板上写下以下乘法算式:
left parenthesis, 2, a, squared, right parenthesis, left parenthesis, 9, a, squared, minus, 16, right parenthesis, equals, 18, a, start superscript, 4, end superscript, minus, 32, a, squared
小斯说 9, a, squared, minus, 1618, a, start superscript, 4, end superscript, minus, 32, a, squared的一个因式.
莎莎说 18, a, start superscript, 4, end superscript, minus, 32, a, squared 可以被 9, a, squared, minus, 16整除.
谁是正确的?
选出正确答案:
不会做了?
不会做了?