问题 计算题

计算:

(1)(ab2c)2÷(ab3c2);

(2)(﹣x﹣y)(x﹣y)+(x+y)2

答案

解:(1)(ab2c)2÷(ab3c2),

=a2b4c2÷(ab3c2),

=ab;

(2)(﹣x﹣y)(x﹣y)+(x+y)2

=y2﹣x2+x2+2xy+y2

=2y2+2xy

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