问题
解答题
计算:
(1)|-1|-2+(π-3)0-2-2;
(2)[(x-y)2-(x-y)2]÷(-2xy)
答案
(1)原式=1-2+1-
=-1 4
;1 4
(2)原式=(x2-2xy+y2-x2+2xy-y2)÷(-2xy)=0.
计算:
(1)|-1|-2+(π-3)0-2-2;
(2)[(x-y)2-(x-y)2]÷(-2xy)
(1)原式=1-2+1-
=-1 4
;1 4
(2)原式=(x2-2xy+y2-x2+2xy-y2)÷(-2xy)=0.