Question

Simplifique a expressão: x(3x+2) - 3 x (x+5)

Answer 1

$\large\sf{}x\left(3x + 2\right) - 3x\left(x + 5\right) \\ \large\sf{} {3x}^{2} + 2x - 3x\left(x + 5\right) \\ \\ \large\sf{}3 {x}^{2} + 2x - {3x}^{2} - 15x \\ \\ \large\sf{}{}\cancel{ {3x}^{2} } + 2x \cancel{ - 3 {x}^{2} } - 15x \\ \\ \large\sf{}2x - 15x \\ {\large\boxed{\boxed{  { \large \sf - 13x}}}}$

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