What must be subtracted from \[{{x}^{4}}+2{{x}^{2}}-3x+7\] to get \[{{x}^{3}}+{{x}^{2}}+x-1?\]

\[a{{\alpha }^{2}}+b\alpha +c=0\]

What must be subtracted from \[{{x}^{4}}+2{{x}^{2}}-3x+7\] to get \[{{

1.	What must be subtracted from \[{{x}^{4}}+2{{x}^{2}}-3x+7\] to get \[{{x}^{3}}+{{x}^{2}}+x-1?\]
A.	\[4{{x}^{2}}+3x=0,5{{x}^{2}}\]
B.	\[a{{x}^{2}}+bx+c=0\]
C.	\[a{{\alpha }^{2}}+b\alpha +c=0\]
D.	\[5{{x}^{2}}-7x-6=0.\]
Answer» B. \[a{{x}^{2}}+bx+c=0\]