问题
解答题
化简: (1)
(2)(x+6)2+(3+x)(3-x). |
答案
(1)原式=
-x x-1
,x-1 x-1
=
,x-(x-1) x-1
=
.1 x-1
(2)原式=x2+12x+36+9-x2,
=12x+45.
化简: (1)
(2)(x+6)2+(3+x)(3-x). |
(1)原式=
-x x-1
,x-1 x-1
=
,x-(x-1) x-1
=
.1 x-1
(2)原式=x2+12x+36+9-x2,
=12x+45.