Question

Identifique as raizes da equação 0,1×2-0,7× + 1 = 0.

Answer 1

$0.1 \times 2 - 0.7x + 1 = 0 \\ 0.2 - 0.7x + 1 = 0 \\ 1.2 - 0.7x = 0 \\ - 0.7x = - 1.2 \\ x = \frac{12}{7}$
forma alternativa
$x = 1.714$