(3a²)-4=.... Tolong dijawab ya

[tex]( 3 {a}^{2} ) - 4 = .... \\ 3 {a}^{2} = 4 \\ {a}^{2} = \frac{4}{3} \\ a = \sqrt{ \frac{4}{3} } [/tex]
[tex]a = \frac{2}{ \sqrt{3} } \\ a = \frac{2}{ \sqrt{3} } \times \frac{ \sqrt{3} }{ \sqrt{3} } \\ a = \frac{2}{3} \sqrt{3} [/tex]
jawabannya a = 2/3 akar 3 atau a = -2/3 akar 3