问题 解答题

计算:

(1)(2m-3)(2m+5);  

(2)(a-2b3-2•(a4b5-1

答案

(1)(2m-3)(2m+5)

=4m2+10m-6m-15

=4m2+4m-15;  

(2)(a-2b3-2•(a4b5-1

=a4b-6•a-4b-5

=b-11

=

1
b11

单项选择题
判断题