Question

(3x² + 3x -20) × (x+3) ​

Answer 1

$\large\bm{\left( {3x}^{2} + 3x - 20 \right) \times\left(x + 3\right) } \\\\ \large\bm{} {3x}^{2} \times \left(x + 3\right) + 3x \times\left(x + 3\right) - 20\left(x + 3\right) \\\\ \large\bm{} {3x}^{3} + {9x}^{2} + 3x \times \left(x + 3\right) - 20\left(x + 3\right) \\\\ \large\bm{} {3x}^{3} + {9x}^{2} + {3x}^{2} + 9x - 20\left(x + 3\right) \\ \ \large\bm{} {3x}^{3} + {9x}^{2} + {3x}^{2} + 9x - 20x - 60 \\\\ \large\bm{} {3x}^{3} + {12x}^{2} + 9x - 20x - 60 \\\\ \bm{\large\boxed{\boxed{  { \large \bm{ {3x}^{3} + {12x}^{2} - 11x - 60}}}}}$

${\large\boxed{\boxed{  { \large \bm{ Bons~Estudos} }}}}$

Answer 2

Resposta:

3x³ + 12x² - 11x - 60.

Explicação passo a passo:

(3x² + 3x - 20) . (x + 3) ​=

3x³ + 9x² + 3x² + 9x - 20x - 60 =

3x³ + 12x² - 11x - 60.