Question

$4 {x}^{2} - 27 = { \times }^{2}$

Answer 1

$4x^{2}$ - $x^{2}$ - 27 = 0

$3x^{2}$ - 27 = 0

$x^{2}$ = 27/3

$x^{2}$ = 9

x= $\sqrt{9}$

x=3

Resposta: x=3