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
计算:
(1)(ab2c)2÷(ab3c2);
(2)(﹣x﹣y)(x﹣y)+(x+y)2
解:(1)(ab2c)2÷(ab3c2),
=a2b4c2÷(ab3c2),
=ab;
(2)(﹣x﹣y)(x﹣y)+(x+y)2,
=y2﹣x2+x2+2xy+y2,
=2y2+2xy