A.\(x \in \left\{ {1;\,\,2} \right\}\)
B.\(x \in \left\{ { - 4;\,\, - 1;\,\,1;\,\,4} \right\}\)
C.\(x \in \left\{ { - 2;\,\, - 1;\,\,1;\,\,2} \right\}\)
D.\(x \in \left\{ { - 2;\,\,0;\,\,2} \right\}\)

A.\(x \in \left\{ { - 4; - 5} \right\}\)
B.\(x \in \left\{ { - 4;5} \right\}\)
C.\(x \in \left\{ {4; - 5} \right\}\)
D.\(x \in \left\{ {4;5} \right\}\)

A.\(x \in \left\{ {1;\,\,2} \right\}\)
B.\(x \in \left\{ {1;\,\, - 2} \right\}\)
C.\(x \in \left\{ { - 1;\,\,2} \right\}\)
D.\(x \in \left\{ { - 1;\,\, - 2} \right\}\)

A.\(x \in \left\{ {1;\,\,2021} \right\}\)
B.\(x \in \left\{ { - 1;\,\,2021} \right\}\)
C.\(x \in \left\{ { - 1;\,\,2020} \right\}\)
D.\(x \in \left\{ {1;\,\,2020} \right\}\)

A.\(x \in \left\{ {1;\,\,2021} \right\}\)
B.\(x \in \left\{ { - 1;\,\,2021} \right\}\)
C.\(x \in \left\{ { - 1;\,\,2020} \right\}\)
D.\(x \in \left\{ {1;\,\,2020} \right\}\)

A.\(m\left( {m - 1} \right)\left( {m - 6} \right)\)
B.\(m\left( {m - 1} \right)\left( {m + 6} \right)\)
C.\(m\left( {m + 1} \right)\left( {m - 6} \right)\)
D.\(m\left( {m + 1} \right)\left( {m + 6} \right)\)

A.\(\left( {x - 1} \right)\left( {{x^2} + x + 4} \right)\)
B.\(\left( {x - 1} \right)\left( {{x^2} - x + 4} \right)\)
C.\(\left( {x + 1} \right)\left( {{x^2} - x - 4} \right)\)
D.\(\left( {x + 1} \right)\left( {{x^2} + x - 4} \right)\)

A.\(\left( {x + 2} \right)\left( {2{x^2} - x + 2} \right)\)
B.\(\left( {x + 2} \right)\left( {2{x^2} + x + 2} \right)\)
C.\(\left( {x - 2} \right)\left( {2{x^2} - x - 2} \right)\)
D.\(\left( {x - 2} \right)\left( {2{x^2} + x - 2} \right)\)

A.\(\left( {3x + 1} \right)\left( {x - 2} \right)\)
B.\(\left( {3x - 1} \right)\left( {x - 2} \right)\)
C.\(\left( {3x + 1} \right)\left( {x + 2} \right)\)
D.\(\left( {3x - 1} \right)\left( {x + 2} \right)\)

A.obvious
B.probably
C.finally
D.supposing