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
计算:
(1)(2m-3)(2m+5);
(2)(a-2b3)-2•(a4b5)-1.
(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