问题
解答题
(1)计算:|-3|-
(2)
|
答案
(1)原式=3-4+1
=0;
(2)原式=
+6 (x+3)(x-3) 1 x-3
=6+x-3 (x+3)(x-3)
=x+3 (x+3)(x-3)
=
.1 x-3
(1)计算:|-3|-
(2)
|
(1)原式=3-4+1
=0;
(2)原式=
+6 (x+3)(x-3) 1 x-3
=6+x-3 (x+3)(x-3)
=x+3 (x+3)(x-3)
=
.1 x-3