Question

Ajudem pfv urgentemente
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Answer 1

Explicação passo-a-passo:

${x}^{2} - \frac{8}{3} x - 1 = 0$

$3( {x}^{2} - \frac{8}{3} x - 1) = 3 \times 0$

${3x}^{2} - 3 \times \frac{8}{3} x - 3 = 0$

${ 3x}^{2} - 8x - 3 = 0$

${3x}^{2} + x - 9x - 3 = 0$

$x \times (3x + 1) - 3(3x + 1) = 0$

$(3x + 1) \times (x - 3) = 0$

$3x + 1 = 0 \\ x - 3 = 0$

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

$\red{\boxed{\blue{\boxed{\green{\boxed{ x_{1} = - 0,333... }}}}}} \\\red{\boxed{\blue{\boxed{\green{\boxed{ x_{2} = 3 }}}}}}$