Đề kiểm tra Chương 3 Đại số 9 năm 2019 Trường THCS Điện Biên

A. (1;-1)     

B. (0; -1) 

C. (49;1)    

D. (0; -3)

A. x² + 2y = 3.              

B. 3x + y² = 2

C. 2x² + 3y² = 5.             

D. 2x + 5y = 7

A. \(\left\{ \begin{array}{l}
y = 2{\rm{x}} - 4\\
y =  - x + 3
\end{array} \right.\)

B. \(\left\{ \begin{array}{l}
y = 2{\rm{x}} - 4\\
y =   x + 3
\end{array} \right.\)

C. \(\left\{ \begin{array}{l}
y = -2{\rm{x}} + 4\\
y =  - x + 3
\end{array} \right.\)

D. \(\left\{ \begin{array}{l}
y = 2{\rm{x}} -+4\\
y =  - x + 3
\end{array} \right.\)

A. 36

B. 52

C. 63

D. 25

A.  a = - 1; b = - 6           

B. a =  1; b = - 6                  

C. a = 1; b = 6                  

D. a = - 1; b = 6

A. \(\left\{ \begin{array}{l}
x = \frac{{2 - y}}{3}\\
y \in R
\end{array} \right.\)

B. \(\left\{ \begin{array}{l}
x = y + 2\\
y \in R
\end{array} \right.\)

C. \(\left\{ \begin{array}{l}
y = 3{\rm{x}} - 2\\
x \in R
\end{array} \right.\)

D. \(\left\{ \begin{array}{l}
y =  - 3{\rm{x + }}2\\
x \in R
\end{array} \right.\)

A. (-3; 5)

B. (3; -1)

C. (3; 1)

D. (-3; 1)

A. \(\left\{ \begin{array}{l}
{\rm{x + 9}}y =  - 5\\
x - 7y = 1
\end{array} \right.\)

B. \(\left\{ \begin{array}{l}
{\rm{4x - 6}}y =  2\\
2x - y = 1
\end{array} \right.\)

C. \(\left\{ \begin{array}{l}
3{\rm{x}} - y = 5\\
2{\rm{x}} + y = 0
\end{array} \right.\)

D. \(\left\{ \begin{array}{l}
3{\rm{x}} - y = -5\\
2{\rm{x}} + y = 0
\end{array} \right.\)

A. \(\left\{ \begin{array}{l}
a =  - 1\\
b = 2
\end{array} \right.\)

B. \(\left\{ \begin{array}{l}
a =  4\\
b = 2
\end{array} \right.\)

C. \(\left\{ \begin{array}{l}
a =  1\\
b = 2
\end{array} \right.\)

D. \(\left\{ \begin{array}{l}
a =  2\\
b = 1
\end{array} \right.\)