Re1.
R(-1)=(-1)^{4}+3(-1)^{3}+2(-1)^{2}+a(-1)+b=
R(2)=2^{4}+3*2^{3}+2*2^{2}+a2+b=0⇒0=-a+b=48+2a+b⇒
3a+b=-48+b⇒a=b-16.
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Re1.
R(-1)=(-1)^{4}+3(-1)^{3}+2(-1)^{2}+a(-1)+b=
R(2)=2^{4}+3*2^{3}+2*2^{2}+a2+b=0⇒0=-a+b=48+2a+b⇒
3a+b=-48+b⇒a=b-16.