A \(\begin{array}{l} a = \sqrt 2 – 2\\ b = -2 \end{array}\) B \(\begin{array}{l} a = \sqrt 2 – 2\\ b = 2 \end{array}\) C \(\begin{array}{l} a = \sqrt 2 + 2\\ b = 2 \end{array}\) D \(\begin{array}{l} a = \sqrt 2 + 2\\ b =- 2 \end{array}\)

A \(\begin{array}{l}

a = \sqrt 2 – 2\\

b = -2

\end{array}\)

B \(\begin{array}{l}

a = \sqrt 2 – 2\\

b = 2

\end{array}\)

C \(\begin{array}{l}

a = \sqrt 2 + 2\\

b = 2

\end{array}\)

D \(\begin{array}{l}

a = \sqrt 2 + 2\\

b =- 2

\end{array}\)

Hướng dẫn Chọn đáp án là: B

Lời giải chi tiết: