Question

Resolva a equação do 2°grau abaixo:
-x² = -1/9

Answer 1

Resposta:

$-x^{2} =-\frac{1}{9} \\\\x^{2} =\frac{1}{9} \\\\x=\sqrt{\frac{1}{9} } \\\\x=\frac{1}{3}$

CS {-1/3, 1/3}

Explicação passo a passo:

Answer 2

Resposta:

$-x^2=-{1\over9}~~~\times(-1)\\ \\ x^2={1\over9}\\ \\ x=\pm\sqrt{{1\over9}} \\ \\ x=\pm{1\over3}$

$S=\{-{1\over3},+{1\over3}\}$