Question

A menor raiz da equação 2x² + x – 3 = 0 vale:
Preciso urgente!!!!!!!

Answer 1

$2x^2+x-3=0\ \to\ a=2,\ b=1,\ c=-3$

$\boxed{x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}}$

$x=\dfrac{-1\pm\sqrt{1^2-4(2)(-3)}}{2(2)}=\dfrac{-1\pm\sqrt{25}}{4}=\dfrac{-1\pm5}{4}$

$\boxed{x=-\dfrac{3}{2}}\ \text{ou}\ \boxed{x=1}$

A menor raiz é $x=-3/2$.