Question

X(3x+4)=-1
Alguém ajuda

Answer 1

Resposta:

$x\left(3x+4\right)=-1\\3x^2+4x=-1\\3x^2+4x+1=0$

$x_{1,\:2}=\frac{-4\pm \sqrt{4^2-4\cdot \:3\cdot \:1}}{2\cdot \:3}$

$x_{1,\:2}=\frac{-4\pm \:2}{2\cdot \:3}$

$x_1=\frac{-4+2}{2\cdot \:3},\:x_2=\frac{-4-2}{2\cdot \:3}$

$x=-\frac{1}{3},\:x=-1$