问题
计算题
化简: (1)214a﹣39a﹣61a.
(2)﹣5(x2﹣3)﹣2(3x2+5).
答案
解:(1)214a﹣39a﹣61a
=(214﹣39﹣61)a
=114a;
(2)﹣5(x2﹣3)﹣2(3x2+5)
=﹣(5x2﹣15)﹣(6x2+10)
=﹣5x2+15﹣6x2﹣10
=﹣11x2+5.
化简: (1)214a﹣39a﹣61a.
(2)﹣5(x2﹣3)﹣2(3x2+5).
解:(1)214a﹣39a﹣61a
=(214﹣39﹣61)a
=114a;
(2)﹣5(x2﹣3)﹣2(3x2+5)
=﹣(5x2﹣15)﹣(6x2+10)
=﹣5x2+15﹣6x2﹣10
=﹣11x2+5.