Đề thi HK1 Toán 8 - Trường THPT Lương Thế Vinh - H...

A \(5{x^2}{y^3}\left( {1 - 5xy + 2x} \right)\)

B \(5{x^2}{y^2}\left( {1 - 5xy + 2x} \right)\)

C \(3{x^2}{y^3}\left( {1 - 5xy + 2x} \right)\)

D \(5{x^2}{y^3}\left( {1 - 4xy + 2x} \right)\)

A \(\left( {y + 3} \right)\left( {x - 2} \right)\)

B \(\left( {y - 3} \right)\left( {x - 2} \right)\)

C \(\left( {y - 3} \right)\left( {x + 2} \right)\)

D \(\left( {y - 2} \right)\left( {x - 3} \right)\)

A \(\left( {x - 3y + z} \right)\left( {x - 3y - z} \right)\)

B \(\left( {5x - 3y + 2z} \right)\left( {x - 3y - 2z} \right)\)

C \(\left( {2x - 3y + 2z} \right)\left( {x - 3y - 2z} \right)\)

D \(\left( {x - 3y + 2z} \right)\left( {x - 3y - 2z} \right)\)

A \(- 16x - 8\)

B \(- 18x + 6\)

C \(- 16x + 8\)

D \(- 18x + 7\)

A  \(25x - 55\)

B  \(27x - 55\)

C  \(25x - 57\)

D  \(23x - 55\)

A \(x =  - 7\)

B \(x =  - 5\)

C \(x =  - 3\)

D \(x =  - 2\)

A \(x = \frac{2}{5}\) hoặc \(x = \frac{1}{2}\)

B \(x = \frac{2}{5}\) hoặc \(x = \frac{-3}{2}\)

C \(x = \frac{2}{5}\) hoặc \(x = \frac{3}{2}\)

D \(x = \frac{1}{5}\) hoặc \(x = \frac{3}{2}\)

A \(x = 0; x =  - 3; x = 2\)

B \(x = -1; x =  - 3; x = 2\)

C \(x = 0; x =  3; x = 2\)

D \(x = 0; x =  - 3; x =- 2\)

A \(11\)

B \(6\)

C \(8\)

D \(14\)