question_answer

Factorize: \[-2xy\text{ }+\text{ }1\text{ }-\text{ }{{y}^{2}}-\text{ }{{x}^{2}}\]

A) \[\left( 1\text{ }+\text{ }x\text{ }-\text{ }y \right)\left( 1\text{ }\text{ }x\text{ }+\text{ }y \right)~\]

B)          \[\left( 1\text{ }+\text{ }x\text{ }+\text{ }y \right)\left( 1\text{ }\text{ }x\text{ }-\text{ }y \right)\]

C) \[\left( 1\text{ }+\text{ }xy \right)\left( x\text{ }+\text{ }y\text{ }+\text{ }l \right)~\]

D)            \[\left( 1\text{ }-\text{ }xy \right)\left( 1+\text{ }x\text{ }+\text{ }y \right)\]

E) None of these