问题
解答题
当x=2-
|
答案
∵x2=(2-
)2=7-43
,3
∴原式=(7+4
)(7-43
)+(2+3
)(2-3
)+3 3
=49-48+[22-(
)2]+3 3
=1+(4-3)+3
=2+
.3
当x=2-
|
∵x2=(2-
)2=7-43
,3
∴原式=(7+4
)(7-43
)+(2+3
)(2-3
)+3 3
=49-48+[22-(
)2]+3 3
=1+(4-3)+3
=2+
.3