Question

resolva as equaçoes do 2° grau.

Answer 1

a)
3 ($x^{2}$ -1) = 24
3$x^{2}$ - 3 = 24
3$x^{2}$ = 24 - 3
3$x^{2}$ = 21
$x^{2}$ = $\frac{21}{7}$
$x^{2}$ = 7
x = $\sqrt{7}$
x = 2,6