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gulerismaylova

 {2x}^{3}  +  {x}^{2}  +  {3x}^{2}  -  {x}^{2}  + 8 =  \  {2x}^{3}  +  {3x}^{2}  + 8

x = 1 :  :  :  :  :  :  {2x}^{3}  +  {3x}^{2}  + 8 =  \ 2 times  {1}^{3}  + 3 times  {1}^{2}  + 8 =  \ 2 times 1 + 3 times 1 + 8 =  \ 2 + 3 + 8 = 13

x =  - 2 :  :  :  :  {2x}^{3}  +  {3x}^{2}  + 8 =  \ 2 times  {2}^{3}  + 3 times  {2}^{2}  + 8 =  \ 2 times 8 + 3 times 4 + 8 =  \ 16 + 12 :  + 8 = 36

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