问题
计算题
化简:(1)4x﹣(x﹣3y);
(2)(5a2+2b2)﹣3(a2﹣4b2).
答案
解:(1)原式=4x﹣x+3y
=3x+3y;
(2)原式=5a2+2b2﹣3a2+12b2
=2a2+14b2.
化简:(1)4x﹣(x﹣3y);
(2)(5a2+2b2)﹣3(a2﹣4b2).
解:(1)原式=4x﹣x+3y
=3x+3y;
(2)原式=5a2+2b2﹣3a2+12b2
=2a2+14b2.