问题
计算题
化简:[(xy﹣2)(xy+2)﹣2x2y2+4] ÷(xy).
答案
解:[(xy﹣2)(xy+2)﹣2x2y2+4]÷(xy),
=(x2y2﹣4﹣2x2y2+4)÷(xy),
=(﹣x2y2)÷(xy),
=﹣xy
化简:[(xy﹣2)(xy+2)﹣2x2y2+4] ÷(xy).
解:[(xy﹣2)(xy+2)﹣2x2y2+4]÷(xy),
=(x2y2﹣4﹣2x2y2+4)÷(xy),
=(﹣x2y2)÷(xy),
=﹣xy