Question

punctul f) ecuație de gradul doi 15 p!

Answer 1

f)

$- 5{x}^{2} + 8x = 0$

$x( - 5x + 8) = 0$

$x_{1} = 0$

$- 5x + 8 = 0 \iff - 5x = - 8 \ \Big|:(-5)$

$\implies x_{2} = \dfrac{8}{5}$

$\implies S = \bigg\{0 ; \dfrac{8}{5} \bigg\}$