Question

Alguem me ajuda nessa equaçao do 2° grau:
5x²/2=2/5

Answer 1

$\frac{5 x^{2} }{2} = \frac{2}{5}$

multiplica cruzado

$25 x^{2} =4$

$x^{2} = \frac{4}{25}$

$x= \sqrt{ \frac{4}{25} }$

x'=$\frac{2}{5}$

x"=$- \frac{2}{5}$

S={$\frac{-2}{5} , \frac{2}{5}$}