#title: Equação grau 2
#let:
 a = [ 1,2,3,4,5];
 b = [ 1,2,3,4,5];
 c = [ 1,2,3,4,5];
n D = #b ** 2 - 4 * #a* #c;
n x1 = (-#b + sqrt(#D))/(2 * #a);
n x2 = (-#b - sqrt(#D))/(2 * #a);
#question:
 Resolva a eq. $#a x^2 + #b x + #c = 0$

#result:
 #x1  \\ #x2

#sugestion:
 use a fórmula resolvente
 $$x = \frac{-b \pm \sqrt{D}}{2 \times a} $$
#resolution:
#Verification
  #x1;
  #x2;