Question

qual é a solução para x(x+5)-2x=28
me ajuda por favor!!!​

Answer 1

$\large\sf{}x\left(x + 5\right) - 2x = 28 \\ \large\sf{} {x}^{2} + 5x - 2x = 28 \\ \large\sf{} {x}^{2} + 3x = 28 \\ \large\sf{} {x}^{2} + 3x - 28 = 0 \\ \large\sf{} {x}^{2} + 7x - 4x - 28 = 0 \\ \large\sf{}x\left(x + 7\right) - 4\left(x + 7\right) = 0 \\ \large\sf{}\left(x + 7\right) \times \left(x - 4\right) = 0 \\ \large\sf{}x + 7 = 0 \\ \large\sf{} x - 4 = 0 \\ \large\sf{}x = - 7 \\ \large\sf{}x = 4 \\ \\\large\sf{} {\large\boxed{\boxed{  { \large \sf x_{1} = - 7 }}}}{\large\boxed{\boxed{  { \large \sf x_{2} = 4 }}}}$

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