Solve x^2 + x – 12 = 0

http://www.regentsprep.org/regents/math/algtrig/ate3/discriminant.htm

Hello! Hav a nice day.

x=3 :D

ax^2 + bx + c  

D=b^2 - 4ac

x1=-b+D^1/2 /2a

x2=-b-D^1/2 /2a