Question

g) x2 - 3 = 0
h) - x2 + 81 = 0​

Answer 1

Resposta:

$g)\\ \\ x^{2} -3=0\\ \\ x^{2} =3\\ \\ x=\sqrt{3} \\ \\ \\ h)\\ \\ -x^{2} +81=0\\ \\ -x^{2} =-81~~.(-1)\\ \\ x^{2} =81\\ \\ x=\sqrt{81} \\ \\ x=9$

Answer 2

Oie, Td Bom?!

g)

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

$x {}^{2} = 3$

$x = ± \sqrt{3}$

$S = \left \{ - \sqrt{3} \: , \: \sqrt{3} \right \}$

h)

$- x {}^{2} + 81 = 0$

$- x {}^{2} = - 81 \: . \: ( - 1)$

$x {}^{2} = 81$

$x = ± \sqrt{81}$

$x = ±9$

$S = \left \{ - 9 \: ,\: 9 \right \}$

Att. Makaveli1996