Question

9x⁴-6x²=0 me ajudem por favor, urgente!

Answer 1

Resposta:

$\textsf{Leia abaixo}$

Explicação passo-a-passo:

$\sf 9x^4 - 6x^2 = 0$

$\sf x^2(9x^2 - 6) = 0$

$\sf 9x^2 - 6 = 0$

$\sf 9x^2 = 6$

$\sf x^2 = \dfrac{6}{9}$

$\sf x = \pm\:\dfrac{\sqrt{6}}{3}$

$\boxed{\boxed{\sf S = \{0,\dfrac{\sqrt{6}}{3},-\dfrac{\sqrt{6}}{3}\}}}$

Answer 2

Oie, Td Bom?!

$9x {}^{4} - 6x {}^{2} = 0$

$3x {}^{2} \: . \: (3x {}^{2} - 2) = 0$

$x {}^{2} \: . \: (3x {}^{2} - 2) = 0$

• $x {}^{2} = 0$

$x = 0$

• $3x {}^{2} - 2 = 0$

$3x {}^{2} = 2$

$x {}^{2} = \frac{2}{3}$

$x = ± \frac{ \sqrt{6} }{3}$

$S = \left \{ - \frac{ \sqrt{6} }{3} \: , \: 0 \: ,\: \frac{ \sqrt{6} }{3} \right \}$

Att. Makaveli1996