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H(-2;0). = (-2)² -3(-2)(0) +2(0)²=8+0+0=8
841+8=849
R(2)=2(2)² -3(2) +1=3
R(-1)=2(-1)² -3(-1) +1=2(1)+3+1=6
R(0)=2(0)² -3(0) +1=1
R(2)+R(-1)=9 /R(0)=9/1=9