2020年黑龙江省绥化市中考数学试卷

$\sqrt{2}-3$

$-\sqrt{2}-3$

$\sqrt{2}+3$

$3-\sqrt{2}$

$b^2·b^3=b^6$

${\left(a^2\right)}^3=a^6$

$-a^2÷a=a$

${\left(a^3\right)}^2·a=a^6$

$\sqrt{16}=\pm 4$

$\sqrt[3]{-8}=2$

$-a\sqrt{\frac{1}{a}}=\sqrt{-a}$

$-\sqrt{64}=-8$

$\left\{\begin{array}{c}x+y=10\\ 49x+37y=466\end{array}\right.$

$\left\{\begin{array}{c}x+y=10\\ 37x+49y=466\end{array}\right.$

$\left\{\begin{array}{c}x+y=466\\ 49x+37y=10\end{array}\right.$

$\left\{\begin{array}{c}x+y=466\\ 37x+49y=10\end{array}\right.$

$\angle \mathit{BAF}=\angle \mathit{DAE}$

$\mathit{EC}=\mathit{FC}$

$\mathit{AE}=\mathit{AF}$

$\mathit{BE}=\mathit{DF}$

$\frac{3}{m+n}$

$\frac{3}{m+n+3}$

$\frac{m+n}{m+n+3}$

$\frac{m+n}{3}$

$y=2{(x-6)}^2$

$y=2{(x-6)}^2+4$

$y=2x^2$

$y=2x^2+4$

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