问题
计算题
化简:(1)2a+2(a+1)﹣3(a﹣1);
(2)﹣3(2x2﹣4xy)+4(x2﹣3xy﹣6).
答案
解:(1)原式=2a+2a+2﹣3a+3
=a+5
(2)原式=﹣6x2+12xy+4x2﹣12xy﹣24
=﹣2x2﹣24
化简:(1)2a+2(a+1)﹣3(a﹣1);
(2)﹣3(2x2﹣4xy)+4(x2﹣3xy﹣6).
解:(1)原式=2a+2a+2﹣3a+3
=a+5
(2)原式=﹣6x2+12xy+4x2﹣12xy﹣24
=﹣2x2﹣24