If the sides of a \[\Delta \]be\[({{x}^{2}}+x+1),\,(2x+1)\] and \[({{x}^{2}}-1),\]then the greatest angle is [EAMCET 1987; Kerala (Engg.) 2001]

If the sides of a \[\Delta \]be\[({{x}^{2}}+x+1),\,(2x+1)\] and \[({{x

1.	If the sides of a \[\Delta \]be\[({{x}^{2}}+x+1),\,(2x+1)\] and \[({{x}^{2}}-1),\]then the greatest angle is [EAMCET 1987; Kerala (Engg.) 2001]
A.	\[{{105}^{o}}\]
B.	\[{{120}^{o}}\]
C.	\[{{135}^{o}}\]
D.	None
Answer» C. \[{{135}^{o}}\]

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If the sides of a \[\Delta \]be\[({{x}^{2}}+x+1),\,(2x+1)\] and \[({{x}^{2}}-1),\]then the greatest angle is [EAMCET 1987; Kerala (Engg.) 2001]

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