A) \[{{x}^{2}}-3x\]
B) \[3x\]
C) \[{{x}^{2}}+5\]
D) \[{{x}^{2}}+3x\]
Correct Answer: C
Solution :
\[({{x}^{2}}+3x+5)\,\,({{x}^{2}}-3x+5)\] \[=({{x}^{2}}+5+3x)\,\,({{x}^{2}}+5-3x)\] \[={{({{x}^{2}}+5)}^{2}}-{{(3x)}^{2}}={{m}^{2}}-{{n}^{2}}\] \[\therefore \] \[m\,={{x}^{2}}+5\]You need to login to perform this action.
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