Respuesta :

TheAnimeGirl

Answer:

  • First step is to remove those unnecessary brackets :

[tex] \longrightarrow\tt \: 9 {x}^{3} + 5 {x}^{2} + 11x - 2 {x}^{3} + 9x - 8 {x}^{2} [/tex]

  • Combine the like terms :

[tex] \longrightarrow \tt \: 9 {x}^{3} - 2 {x}^{3} + 5 {x}^{2} - 8 {x}^{2} + 11x + 9x[/tex]

[tex] \longrightarrow \boxed{\tt \: 7 {x}^{3} - 3 {x}^{2} + 20x}[/tex]

  • Our final answer is 7x^3 - 3x^2 + 20x .

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