Question

Me ayudan con esta ecuación cuadrática
-2/5x^2+3/5=-1

Answer 1

$-\frac{2}{5}x^2+\frac{3}{5}=-1$

$-\frac{2}{5}x^2+\frac{3}{5}-\frac{3}{5}=-1-\frac{3}{5}$

$-\frac{2}{5}x^2=-\frac{8}{5}$

$\left(-\frac{2}{5}x^2\right)\left(-5\right)=\left(-\frac{8}{5}\right)\left(-5\right)$

$2x^2=8$

$\frac{2x^2}{2}=\frac{8}{2}$

$x^2=4$

$x=\sqrt{4},\:x=-\sqrt{4}$

$x=2,\:x=-2$