Question

me ajudem a calcular x3 -5x2 +4=0

Answer 1

$3x - 5 \times 2x + 4 = 0$
$3x \times 2x - 5 + 4 = 0$
$6x - 5 + 4 = 0$
$6x -(5 - 4) = 0$
$6x - 1 = 0$
$6x = 0 + 1$
$6x = 1$
$\boxed {x = \frac{1}{6} }$

Resposta: $x = \frac{1}{6}$

Espero eu ter te ajudado