问题
解答题
化简下列各式:
(1)-3x2y+3xy2+2x2y-2xy2;
(2)2(a-1)-(2a-3)+3.
答案
(1)-3x2y+3xy2+2x2y-2xy2=-x2y+xy2;
(2)2(a-1)-(2a-3)+3,
=2a-2-2a+3+3,
=4.
化简下列各式:
(1)-3x2y+3xy2+2x2y-2xy2;
(2)2(a-1)-(2a-3)+3.
(1)-3x2y+3xy2+2x2y-2xy2=-x2y+xy2;
(2)2(a-1)-(2a-3)+3,
=2a-2-2a+3+3,
=4.