问题
解答题
计算: (1)
(2)
|
答案
(1)原式=
÷(x-1)2 (x+1)(x-1) x-1 x(x+1)
=
•x-1 x+1 x(x+1) x-1
=x;
(2)原式=
-3(x+4) (x+4)(x-4) 24 (x+4)(x-4)
=3x-12 (x+4)(x-4)
=
.3 x+4
计算: (1)
(2)
|
(1)原式=
÷(x-1)2 (x+1)(x-1) x-1 x(x+1)
=
•x-1 x+1 x(x+1) x-1
=x;
(2)原式=
-3(x+4) (x+4)(x-4) 24 (x+4)(x-4)
=3x-12 (x+4)(x-4)
=
.3 x+4