1.

Which of these expressions does not have x +\[x+3\] as one of its factors?

A. \[{{x}^{2}}+7x+12\]        
B.        \[{{x}^{2}}+x-12\]           
C.        \[{{x}^{2}}-x-12\]            
D.        \[{{x}^{2}}-2x-15\]
Answer» C.        \[{{x}^{2}}-x-12\]            


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