共50条信息
若\(x\),\(y\)满足方程组\(\begin{cases}x-y=- \dfrac{1}{2}, \\ 2x+2y=5,\end{cases} \)则\(x^{2}-y^{2}\)的值为__________.
已知\(x^{2}-y^{2}=15\),\(x-y=3\),则\(x+y=\)________.
计算\(( \sqrt{2}+1{)}^{10}( \sqrt{2}-1{)}^{11} \)_______\( \_\)
计算:\(2015^{2}-2014×2016=\) ________ .
已知\(a\)\({\,\!}^{2}-\)\(b\)\({\,\!}^{2}=6\),\(a\)\(-\)\(b\)\(=-2\),则\(a\)\(+\)\(b\)\(=\) .
如图,\(\triangle \)\(OAC\)和\(\triangle \)\(BAD\)都是等腰直角三角形,\(∠\)\(ACO\)\(=∠\)\(ADB\)\(=90^{\circ}\),反比例函数\(y=\dfrac{k}{x}\)在第一象限的图象经过点\(B\)\(.\)若\(OA\)\({\,\!}^{2}-\)\(AB\)\({\,\!}^{2}=9\),则\(k\)的值为
计算\(( \sqrt{5} + \sqrt{3} )( \sqrt{5} - \sqrt{3} )\)的结果等于 .
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