问题
填空题
已知x2-4x+1=0,求
|
答案
∵x2-4x+1=0,x≠0,
∴x+
=4,1 x
则
=x2 x4+x2+1
=1
+x2+11 x2
=1 (x+
)2-11 x
.1 15
故答案为:1 15
已知x2-4x+1=0,求
|
∵x2-4x+1=0,x≠0,
∴x+
=4,1 x
则
=x2 x4+x2+1
=1
+x2+11 x2
=1 (x+
)2-11 x
.1 15
故答案为:1 15