A) \[-12{{x}^{2}}{{y}^{2}}\]
B) \[10{{x}^{2}}{{y}^{2}}\]
C) \[-12xy\]
D) \[10xy\]
Correct Answer: B
Solution :
(b) One can also do it m the following conventional way: Mathematical Ingenuity tips However, if we do it by first bringing \[{{({{x}^{2}}-{{y}^{2}})}^{2}}\] in the form of \[{{x}^{4}}+8{{x}^{2}}{{y}^{2}}+{{y}^{4}}\] and then, mentally think as to what extra term is getting added or subtracted, it will help solve us many more problems of similar nature.You need to login to perform this action.
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