Question

пжпжпжаааа́аааааааа​

Answer 1

$4 {a}^{3} + 4 {a}^{2} - 3a - 3 = 0 \\ 4 {a}^{2} (a + 1) - 3(a + 1) = 0 \\ (a + 1)(4 {a}^{2} - 3) = 0 \\ a + 1 = 0 \\ a1 = - 1 \\ \\ 4 {a}^{2} - 3 = 0 \\ {a}^{2} = \frac{3}{4} \\ a2 = \frac{ \sqrt{3} }{2} \\ a3 = - \frac{ \sqrt{3} }{2}$