问题
解答题
已知x=1,求
|
答案
原式=
÷2(x+2) (x-2)2
•(x+2)(x-2)(x+2)(x2-2x+4) 2(x+2)
=
•2(x+2) (x-2)2
•(x+2)(x-2)2(x+2) (x+2)(x2-2x+4)
=
,4(x+2)2 (x-2)(x2-2x+4)
当x=1时,原式=
=4×(1+2)2 (1-2)(1-2+4)
=-12.36 -3
已知x=1,求
|
原式=
÷2(x+2) (x-2)2
•(x+2)(x-2)(x+2)(x2-2x+4) 2(x+2)
=
•2(x+2) (x-2)2
•(x+2)(x-2)2(x+2) (x+2)(x2-2x+4)
=
,4(x+2)2 (x-2)(x2-2x+4)
当x=1时,原式=
=4×(1+2)2 (1-2)(1-2+4)
=-12.36 -3