Question

How to do 43 ? Thank you!

Answer 1

$2 {x}^{3} - 5 {x}^{2} + x + 2 = 0$
$2 {x}^{3} - 4 {x}^{2} - {x}^{2} + 2x - x + 2 = 0$
$2 {x}^{2} (x - 2) - x(x - 2) - (x - 2) = 0$
$(x - 2)(2 {x}^{2} - x - 1) = 0$
$(x - 2)(2 {x}^{2} - 2x + x - 1) = 0$
$(x - 2)(x - 1)(2x + 1) = 0$
$x = 2$
$x = 1$
$x = - 0.5$