Respuesta:
[tex](x - 3)(x2 + 3x + 9) - ( x 3 - 30) \\ (x - 3)(x \times 2 + 3x + 9) - (x \times 3 - 30) \\ (x - 3)(2x + 3x + 9) - (3x - 30) \\ (x - 3)(5x + 9) - 3x + 30 \\ 5 {x}^{2} + 9x - 15x - 27 - 3x + 30 \\ 5 {x}^{2} - 9x + 3[/tex]
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Respuesta:
[tex](x - 3)(x2 + 3x + 9) - ( x 3 - 30) \\ (x - 3)(x \times 2 + 3x + 9) - (x \times 3 - 30) \\ (x - 3)(2x + 3x + 9) - (3x - 30) \\ (x - 3)(5x + 9) - 3x + 30 \\ 5 {x}^{2} + 9x - 15x - 27 - 3x + 30 \\ 5 {x}^{2} - 9x + 3[/tex]