If \[\mathbf{x}+\mathbf{1}\text{ }\mathbf{and}\text{ }\mathbf{x}-\mathbf{1}\] are factors of \[\mathbf{f}\left( \mathbf{x} \right)\mathbf{=}{{\mathbf{x}}^{\mathbf{4}}}\mathbf{+3ax+b,}\] then the value of \[\mathbf{3a}+\mathbf{2b}\] is

If \[\mathbf{x}+\mathbf{1}\text{ }\mathbf{and}\text{ }\mathbf{x}-\math

1.	If \[\mathbf{x}+\mathbf{1}\text{ }\mathbf{and}\text{ }\mathbf{x}-\mathbf{1}\] are factors of \[\mathbf{f}\left( \mathbf{x} \right)\mathbf{=}{{\mathbf{x}}^{\mathbf{4}}}\mathbf{+3ax+b,}\] then the value of \[\mathbf{3a}+\mathbf{2b}\] is
A.	5
B.	-1
C.	4
D.	-6
Answer» C. 4

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If \[\mathbf{x}+\mathbf{1}\text{ }\mathbf{and}\text{ }\mathbf{x}-\mathbf{1}\] are factors of \[\mathbf{f}\left( \mathbf{x} \right)\mathbf{=}{{\mathbf{x}}^{\mathbf{4}}}\mathbf{+3ax+b,}\] then the value of \[\mathbf{3a}+\mathbf{2b}\] is

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