问题
填空题
计算:(x2n-2xnyn+y2n)÷(xn-yn)(n为正整数)=______.
答案
(x2n-2xnyn+y2n)÷(xn-yn)
=(xn-yn)2÷(xn-yn)
=xn-yn.
故应填:xn-yn.
计算:(x2n-2xnyn+y2n)÷(xn-yn)(n为正整数)=______.
(x2n-2xnyn+y2n)÷(xn-yn)
=(xn-yn)2÷(xn-yn)
=xn-yn.
故应填:xn-yn.