(√7-√6)2(√7+√6)2

4.2\u96646\u5206\u4e4b7

3.6

\u539f\u5f0f
=13\u5206\u4e4b2\u00d75\u5206\u4e4b6+13\u5206\u4e4b2\u00d75\u5206\u4e4b7
=13\u5206\u4e4b2\u00d7\uff085\u5206\u4e4b6+5\u5206\u4e4b7\uff09
=13\u5206\u4e4b2\u00d75\u5206\u4e4b13
=5\u5206\u4e4b2

~\u4e00\u523b\u6c38\u8fdc523\u4e3a\u4f60\u89e3\u7b54\uff0c\u795d\u4f60\u5b66\u4e60\u8fdb\u6b65~~~
~\u5982\u679c\u4f60\u8ba4\u53ef\u6211\u7684\u56de\u7b54\uff0c\u8bf7\u53ca\u65f6\u70b9\u51fb\u3010\u91c7\u7eb3\u4e3a\u6ee1\u610f\u56de\u7b54\u3011\u6309\u94ae~
~\u624b\u673a\u63d0\u95ee\u8005\u5728\u5ba2\u6237\u7aef\u4e0a\u8bc4\u4ef7\u70b9\u201c\u6ee1\u610f\u201d\u5373\u53ef~~
~\u4f60\u7684\u91c7\u7eb3\u662f\u6211\u524d\u8fdb\u7684\u52a8\u529b~~~
~\u5982\u8fd8\u6709\u65b0\u7684\u95ee\u9898\uff0c\u8bf7\u53e6\u5916\u5411\u6211\u6c42\u52a9\uff0c\u7b54\u9898\u4e0d\u6613\uff0c\u656c\u8bf7\u8c05\u89e3~~

(√7-√6)^2(√7+√6)^2
=[(√7-√6)(√7+√6)]^2
=1^2
=1

=[(√7-√6)(√7+√6)]^2
=1^2
=1

没写清楚啊

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