Question

Rezolvati in R ecuatia:3x la a doua-4x=0.

Answer 1

$3 {x}^{2} - 4x = 0$

$a = 3$

$b = - 4$

$c = 0$

$delta = {b}^{2} - 4 \times a \times c$

$delta = {( - 4)}^{2} - 4 \times 3 \times 0 = 16 - 0 = 16$

$x(1.2) = \frac{ - b + - \sqrt{delta} }{2a}$

$x(1.2) = \frac{ - ( - 4) + - \sqrt{16} }{2 \times 3}$

$x(1.2) = \frac{4 + - 4}{6}$

$x(1) = \frac{4 + 4}{6} = \frac{8}{6} = \frac{4}{3}$

$x(2) = \frac{4 - 4}{6} = \frac{0}{6} = 0$