问题
解答题
已知x2-2=0,求代数式
|
答案
原式=
+(x-1)2 (x-1)(x+1) x2 x+1
=
+x-1 x+1 x2 x+1
=
;x2+x-1 x+1
∵x2-2=0,∴x2=2;
∴原式=
=1.2+x-1 x+1
已知x2-2=0,求代数式
|
原式=
+(x-1)2 (x-1)(x+1) x2 x+1
=
+x-1 x+1 x2 x+1
=
;x2+x-1 x+1
∵x2-2=0,∴x2=2;
∴原式=
=1.2+x-1 x+1