Question

$3x^{2} -\frac{21}{9} =-9$

Answer 1

Respuesta:

$x=\sqrt{-\frac{60}{27} }$

Explicación paso a paso:

$3x^2-\frac{21}{9} =-9\\3x^2=-9+\frac{21}{9} \\3x^2=\frac{-81+21}{9}\\ 3x^2=\frac{-60}{9} \\x^2=\frac{-60}{\frac{9}{3} } \\x^2=\frac{-60}{9*3} \\x^2=\frac{-60}{27} \\x^2=-\frac{60}{27} \\x=\sqrt{-\frac{60}{27} }$