Question

Resolva:
x (3x+4) = -1

Answer 1

x(3x+4)=-1

3x ao quadrado + 4x=-1

3x ao quadrado +4x +1=0

delta= b ao quadrado -4ac

delta= 16-12=4

basckara= -b +ou- raiz de delta/2a

basckara= -4 +ou- 2 /6

x´= -4+2/6= -1/3

x´´=-4-2/6= -1

Answer 2

Olá, boa tarde!

Resposta:

$\boxed{\color{red}{\mathsf{x'=3x=-1 \ \longrightarrow \ x'=-\dfrac{1}{3}}}}$

$\boxed{\color{red}{\mathsf{x"=x=-1 \ \longrightarrow \ x" =-1}}}$

Explicação passo-a-passo:

$\mathsf{x (3x+4) = -1}$

$\mathsf{3x^2 +4x=-1}$

$\mathsf{3x^2 +4x +1=0}$

$\mathsf{(3x+1)(x+1) =0}$

$\mathsf{x'=3x=-1 \ \longrightarrow \ x'=-\dfrac{1}{3}}$

$\mathsf{x"=x=-1 \ \longrightarrow \ x" =-1}$