A) \[\left( 7{{x}^{2}}\,-\,9{{y}^{2}}\,-\,5xy \right)\]
B) \[\left( 7{{x}^{2}}\,+\,9{{y}^{2}}\,-\,5xy \right)\]
C) \[\left( 7{{x}^{2}}\,+\,9{{y}^{2}}\,+\,5xy \right)\]
D) \[\left( 7{{x}^{2}}\,+\,9{{y}^{{}}}\,-\,5xy \right)\]
E) None of these
Correct Answer: B
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