问题
解答题
先化简:(
|
答案
原式=
•4x x-3
-(x-3)(x+3) 3x
•x x+3 (x-3)(x+3) 3x
=
-4(x+3) 3 x-3 3
=4x+12-x+3 3
=3x+15 3
=x+5,
当x=2时,原式=2+5=7.
先化简:(
|
原式=
•4x x-3
-(x-3)(x+3) 3x
•x x+3 (x-3)(x+3) 3x
=
-4(x+3) 3 x-3 3
=4x+12-x+3 3
=3x+15 3
=x+5,
当x=2时,原式=2+5=7.