问题
解答题
计算: (1)(
(2)a-2b3÷(a2b)-3. |
答案
(1)原式=【
-x+2 x(x-2)
】•x x(x-2) x 2
=
•x+2-x x(x-2) x 2
=
;1 x-2
(2)原式=a-2b3•(a2b)3
=a-2b3•a6b3
=a4b6.
计算: (1)(
(2)a-2b3÷(a2b)-3. |
(1)原式=【
-x+2 x(x-2)
】•x x(x-2) x 2
=
•x+2-x x(x-2) x 2
=
;1 x-2
(2)原式=a-2b3•(a2b)3
=a-2b3•a6b3
=a4b6.