Đề thi chính thức vào 10 môn Toán Trường Phổ Thông...

A \({a^2} - {b^2}\) 

B \({\left( {a - b} \right)^2}\)

C \({\left( {a + b} \right)^2}\)

D \({a^2} + {b^2}\)

A \(\sqrt {2019}  - \sqrt {2018} \)

B \(\sqrt {2018}  - \sqrt {2019} \)

C \(\sqrt {2018}  - \sqrt {2019}  - 2\)

D \(\sqrt {2018}  + \sqrt {2019} \)

A \(m =  - \frac{1}{4}\)

B \(m = \frac{1}{4}\)

C \(m =  - \frac{1}{2}\)

D

\(m = \frac{1}{2}\)

A \(x = \frac{{5 \pm \sqrt {37} }}{2}\)

B \(x = \frac{{5 \pm \sqrt {29} }}{2}\)

C \(x = \frac{{3 \pm \sqrt {37} }}{2}\)

D \(x = \frac{{3 \pm \sqrt {29} }}{2}\)

A \((x;y) = \left( { - 1;\,\frac{1}{2}} \right).\)

B \((x;y) = \left( { - 1; - \frac{1}{2}} \right).\)

C \((x;y) = \left( {1;\,\frac{1}{2}} \right).\)

D \((x;y) = \left( {1; - \frac{1}{2}} \right).\)

A \((x;y) = \left\{ {\left( {3;11} \right);\,\,\left( {1;\, - 1} \right);\,\,\left( {0;2} \right);\,\,\left( { - 2;4} \right)} \right\}.\)

B \((x;y) = \left\{ {\left( { - 3; - 11} \right);\,\,\left( {1;\,1} \right);\,\,\left( {0;2} \right);\,\,\left( { - 2; - 4} \right)} \right\}.\)

C \((x;y) = \left\{ {\left( { - 3; - 11} \right);\,\,\left( {1;\, - 1} \right);\,\,\left( {0;2} \right);\,\,\left( { - 2; - 4} \right)} \right\}.\)

D \((x;y) = \left\{ {\left( { - 3;11} \right);\,\,\left( {1;\,1} \right);\,\,\left( {0;2} \right);\,\,\left( { - 2;4} \right)} \right\}.\)

A \(7\)

B \(8\)

C \(9\)

D \(10\)