问题
解答题
化简:
(1)8a+2b+(5a-b);
(2)(8xy-x2+y2)-3(-x2+y2+5xy).
答案
(1)8a+2b+(5a-b)
=8a+5a+2b-b
=13a+b;
(2)8xy-x2+y2+3x2-3y2-15xy=2x2-7xy-2y2.
化简:
(1)8a+2b+(5a-b);
(2)(8xy-x2+y2)-3(-x2+y2+5xy).
(1)8a+2b+(5a-b)
=8a+5a+2b-b
=13a+b;
(2)8xy-x2+y2+3x2-3y2-15xy=2x2-7xy-2y2.