问题
填空题
计算:
(2x+1)(2x-1)=______;
(x-y)2=______.
答案
(2x+1)(2x-1)=4x2-1;
(x-y)2=x2-2xy+y2.
故答案为:4x2-1;x2-2xy+y2.
计算:
(2x+1)(2x-1)=______;
(x-y)2=______.
(2x+1)(2x-1)=4x2-1;
(x-y)2=x2-2xy+y2.
故答案为:4x2-1;x2-2xy+y2.