Question

3×^(2)=27 me ajudem porfavor

Answer 1

$3 x^{2} =27$
$x^{2} = \frac{27}{3}$
$x^{2} =9$
$x^{2} = \sqrt{9}$
$x=+,ou,-3$

Answer 2

Resolução:
$3 x^{2} =27$
$3 x^{2} -27=0$
$3( x^{2} -9)=0$
$3(x - 3) . (x + 3) = 0$
$(x - 3) . (x + 3) = 0$
$x-3 = 0$
$x+3=0$
$x_{1} = -3$
$x_{2} = 3$