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

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

A.\(2b\)
B.\(a\)
C.\(0\)
D.\(b\)

A.\({\left( {a - 2b} \right)^2}\left( {3x - 2} \right)\left( {3x + 2} \right)\)
B.\({\left( {2a - b} \right)^2}\left( {3x - 2} \right)\left( {3x + 2} \right)\)
C.\({\left( {2a - b} \right)^2}\left( {3x - \sqrt 2 } \right)\left( {3x + \sqrt 2 } \right)\)
D.\({\left( {a - 2b} \right)^2}\left( {3x - \sqrt 2 } \right)\left( {3x + \sqrt 2 } \right)\)

A.\( - \dfrac{4}{9}\)
B.\(\dfrac{4}{9}\)
C.\(\dfrac{9}{4}\)
D.\( - \dfrac{9}{4}\)

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

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

A.\(2\left( {a + b + c} \right)\left( {a - b - c} \right)\)
B.\(2\left( {a - b + c} \right)\left( {a + b - c} \right)\)
C.\(2\left( {a + b + c} \right)\left( {a + b - c} \right)\)
D.\(\left( {a + b + c} \right)\left( {a - b - c} \right)\)

A.\(2\left( {a + b + c} \right)\left( {a - b - c} \right)\)
B.\(2\left( {a - b + c} \right)\left( {a + b - c} \right)\)
C.\(2\left( {a + b + c} \right)\left( {a + b - c} \right)\)
D.\(\left( {a + b + c} \right)\left( {a - b - c} \right)\)

A.\(\left( {a + b + c} \right)\left( {a + b - c} \right)\left( {b + c - a} \right)\left( {b + c + a} \right)\)
B.\(\left( {a - b + c} \right)\left( {a + b - c} \right)\left( {b - c + a} \right)\left( {b + c - a} \right)\)
C.\(\left( {a + b + c} \right)\left( {a + b - c} \right)\left( {b + c - a} \right)\left( {b - c + a} \right)\)
D.\(\left( {a - b + c} \right)\left( {a + b - c} \right)\left( {b + c - a} \right)\left( {b + c + a} \right)\)