Question

resolva as equações incompletas do 2 grau em R. a) x( x + 4) = 1/3 + 4x.

Answer 1

Oie, Td Bom?!

$x \: . \: (x + 4) = \frac{1}{3} + 4x \\ x {}^{2} + 4x = \frac{1}{3} + 4x \\ x {}^{2} = \frac{1}{3} \\ x = ± \sqrt{ \frac{1}{3} } \\ x = ± \frac{ \sqrt{3} }{3}$

$x = - \frac{ \sqrt{3} }{3} \\ x = \frac{ \sqrt{3} }{3}$

S = $\left \{ x_{1} = - \frac{ \sqrt{3} }{3} \: , \: x_{2} = \frac{ \sqrt{3} }{3} \right \}$

Att. Makaveli1996

Answer 2

a) x(x + 4) = 1/3 + 4x

x² + 4x = 1/3 + 4x

x² + 4x - 4x = 1/3

x² = 1/3

x = ± 1/√3

x = ± √3/3

Espero Ter Ajudado !!