问题
解答题
计算下列各题. (1)(2a-1b2)2•(-a2b3)•(3ab-2)3; (2)(
(3)
(4)
|
答案
(1)原式=4a-2b4•(-a2b3)•27a3b-6
=-108a3b;
(2)原式=
•x(x+2)-x(x-2) (x-2)(x+2) 2-x 4x
=
•4x (x-2)(x+2) 2-x 4x
=-
;1 x+2
(3)原式=
+(x+1)(x-1) (x-1)2
•x(x-2) x-2 1 x
=
+1x+1 x-1
=
;2x x-1
(4)原式=
÷a(a+1) a-1 a(a-1)-a a-1
=
÷a(a+1) a-1 a(a-2) a-1
=
•a(a+1) a-1 a-1 a(a-2)
=
.a+1 a-2